KR101670612B1 - Method for manufacturing a plate type solid oxide fuel cell - Google Patents

Abstract

Provided is a method for producing a flat solid oxide fuel cell. The production method comprises the following steps: preparing an anode support via a tape casting method and a first heat treatment process; forming a sacrificial film including an organic compound on a first surface of the anode support via a second heat treatment; forming a first functional anode film and a second functional anode film on a second surface of the anode support and the sacrificial film, by immersing the anode support in a first solution; forming a first electrolyte film and a a second electrolyte film on the first functional anode film and the second functional anode film, by immersing the anode support in a second solution; removing the first electrolyte film, the first functional anode film, and the sacrificial film on the first surface of the anode support, via a third heat treatment; and forming a cathode on the second electrolyte film.

Description

[0001] The present invention relates to a method of manufacturing a solid oxide fuel cell,

The present invention relates to a method of manufacturing a flat plate type solid oxide fuel cell, and more particularly, to a method of manufacturing a flat type solid oxide fuel cell, which comprises forming a sacrificial film on one surface of a negative electrode support and then forming a functional negative electrode film on the negative electrode support and the sacrificial film, And forming the electrolyte membrane on only one side of the negative electrode support by removing the sacrificial layer through heat treatment. The present invention also relates to a method of manufacturing a flat type solid oxide fuel cell.

A fuel cell is a device that converts a change in free energy due to electrochemical reaction between fuel and oxygen into electric energy. A solid oxide fuel cell using an ion conductive oxide as an electrolyte has the highest energy conversion efficiency among the fuel cells that have been developed up to now to produce electric energy and thermal energy at a high temperature of about 600 to 1000 ° C. It has the advantage of using various raw materials such as natural gas and coal gas as a fuel due to operation at high temperature. It can be used for a long time because there is no problem such as corrosion or loss of material by using solid electrolyte and solid electrode. . In addition, when hydrogen is used as fuel, only pure water is discharged and it is attracting much attention because it can be used as a future clean energy source.

A solid oxide fuel cell is a fuel cell that has a dense structure of an oxygen ion conducting electrolyte and an air electrode that reacts with oxygen in the air to react with oxygen ions or oxygen ions that move through the cathode and oxygen ion conducting electrolyte react with hydrogen or carbon It is composed of anode or anode that produces water or carbon dioxide and emits electrons. The battery composed of the air electrode / electrolyte / fuel electrode is called a single cell. Since the driving force for causing the reaction in the air electrode and the fuel electrode is a difference in oxygen partial pressure to the air electrode and the fuel electrode, air flowing into the anode, It becomes very important not to. The shape of a single cell can be divided into a tubular type and a planar type. In the case of a cylindrical type, the gas can be easily separated. However, due to the shape of the current collector connecting the unit cell and the unit cell, There is a drawback that the energy loss is high. In the case of the flat plate type, there is an advantage that the energy loss is small because of the structural characteristic that the whole electrode can be easily connected to the current collector.

Korean Patent Laid-Open Publication No. KR20150035457A (Applicant: LG Chem, Application No. KR20140129594A)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of manufacturing a planar solid oxide fuel cell having high productivity.

It is another object of the present invention to provide a method of manufacturing a planar solid oxide fuel cell which reduces process time and process cost.

Another object of the present invention is to provide a method of manufacturing a planar solid oxide fuel cell which reduces the internal stress of the cathode support and the electrolyte membrane.

 It is another object of the present invention to provide a fuel cell having improved fuel gas consumption efficiency and a method of manufacturing the fuel cell.

The technical problem to be solved by the present invention is not limited to the above.

In order to solve the above-described technical problems, the present invention provides a method of manufacturing a planar solid oxide fuel cell.

According to one embodiment, a method of manufacturing a planar solid oxide fuel cell includes providing an anode support including a first surface and a second surface opposite the first surface, Preparing a sacrificial film comprising an organic compound on the first surface of the cathode support and a second surface of the cathode support by a second thermal treatment; Forming a first anode functional film on the sacrificial layer by dipping the cathode support on which the sacrificial layer is formed in a first solution to form a first anode functional film on the sacrificial layer, Forming a first functional anode film and a second functional anode film on the first functional anode film together with the first functional anode film and the second functional anode film, First Functionality Forming a first electrolyte film on the cathode film, forming a second electrolyte film on the second functional cathode film together with the first electrolyte film, and forming a second electrolyte film on the third functional film, And removing the sacrificial layer, the first functional cathode layer, and the first electrolyte layer on the first surface of the cathode support.

According to one embodiment, in the method of manufacturing a planar solid oxide fuel cell, at least a part of the sacrificial layer is melted by the second heat treatment to produce a melt film, , The molten film phase-changes into the sacrificial film in a solid state, and is bonded onto the first surface of the cathode support.

According to one embodiment, the step of removing the sacrificial layer, the first functional negative electrode layer, and the first electrolyte layer on the first surface of the negative electrode support may include, by the third heat treatment, burn-out, and the sacrificial layer and the first functional cathode layer and the first electrolyte layer on the sacrificial layer are removed together.

According to one embodiment, the manufacturing method of the planar solid oxide fuel cell may further include removing the sacrificial layer, the first functional cathode layer, and the first electrolyte layer by the third heat treatment, The second functional cathode layer, and the second electrolyte layer may be partially sintered.

According to one embodiment, preparing the negative electrode support may further include performing a first thermal treatment on the negative electrode support to impart mechanical strength to the negative electrode support.

According to one embodiment, the manufacturing method of the planar solid oxide fuel cell may include the first and third heat treatment temperatures higher than the second heat treatment temperature.

According to one embodiment, the first solution and the second solution may be a colloidal solution containing a metal oxide powder.

According to one embodiment, the manufacturing method of the planar solid oxide fuel cell may further include a step of forming the functional negative films and the electrolyte films on the negative electrode support, depending on the concentration of the first solution and the second solution, Lt; / RTI >

According to an embodiment, the first electrolyte membrane and the second electrolyte membrane produced by immersing the cathode support in the second solution may include a dense thin film.

According to one embodiment, the sacrificial membrane may comprise at least one of parafilm and paraffin wax.

According to another embodiment, a method of manufacturing a planar solid oxide fuel cell includes the steps of preparing a cathode support comprising a first surface and a second surface opposite the first surface, by laminating, Forming a functional cathode film on the first one of the first surface and the second surface of the cathode support by a second heat treatment to form a functional cathode film on the first surface and the second surface of the cathode support; Forming a first electrolyte film on the functional anode film by immersing the functional cathode film and the cathode support on which the sacrificial film is formed by immersing the cathode film in an electrolytic solution to form a first electrolyte film on the sacrificial film; Removing the sacrificial film and the second electrolyte film on the second surface of the negative electrode support by a second heat treatment step, forming the second electrolyte film together, and a third heat treatment.

According to another embodiment, in the step of removing the sacrificial layer and the second electrolyte layer on the cathode support, the sacrificial layer is burned out by the third heat treatment, and the sacrificial layer and the second electrolyte layer on the sacrificial layer 2 < / RTI > electrolyte membrane together.

According to another embodiment, the manufacturing method of the planar solid oxide fuel cell further comprises a step of removing the sacrificial layer and the second electrolyte layer by the third heat treatment, and the cathode support and the functional cathode layer are partially sintered ≪ / RTI >

According to another embodiment, the manufacturing method of the planar solid oxide fuel cell may include the first electrolyte membrane and the second electrolyte membrane, which are formed by dipping the anode support in the electrolyte solution, into a dense thin film .

According to another embodiment, a method of manufacturing a planar solid oxide fuel cell includes the steps of preparing a cathode support including a first surface and a second surface opposite to the first surface, Forming a sacrificial layer containing organic material on the first surface of the cathode support and the first surface of the cathode support; dipping the cathode support on which the sacrificial layer is formed in the first solution to form a sacrificial layer on the sacrificial layer; Forming a first functional negative electrode film and forming a second functional negative electrode film on a second side of the negative electrode support by a third heat treatment, forming the sacrificial film on the first surface of the negative electrode support and the first functional negative electrode Removing the film, and forming an electrolyte film on the second functional negative electrode film by laminating.

According to another embodiment, the step of removing the sacrificial layer and the first functional negative electrode layer by the third heat treatment may include a step of removing the sacrificial layer and the first functional negative electrode layer before the step of forming the electrolyte layer on the second functional negative electrode layer by the laminating, Or may be performed later.

According to another embodiment, in the method of manufacturing a planar solid oxide fuel cell, the sacrificial film and the first functional negative film are removed by the third heat treatment, and the second functional negative film is partially sintered ≪ / RTI >

In the planar solid oxide fuel cell according to the embodiment of the present invention, a sacrificial layer is formed on the first surface of the anode support, and then a first functional cathode layer and an electrolyte layer are formed on the sacrificial layer using an immersion process , A second functional cathode layer and a second electrolyte layer may be formed on the second surface of the cathode support. The first functional negative electrode film and the first electrolyte film on the sacrificial layer may be removed together by burning out the sacrificial layer formed on the first surface of the negative electrode support through heat treatment.

Accordingly, it is possible to form the first functional negative electrode film and the first electrolyte film on the first surface of the plurality of cathode supports through the immersion process, which is simple in process. Therefore, in the planar solid oxide fuel cell The production yield can be improved.

Further, the second electrolyte film formed on the cathode support by the immersion process and the burn-out process may be a thin film having a dense structure by a high-temperature heat treatment, i.e., a sintering process. As a result, the externally supplied to the positive electrode of said planar type solid oxide fuel cell, the oxygen (O _2), the second electrolyte, and is fed to meet the catalytic reaction zone the oxygen ions and electrons and the reaction brought to the anode (O ^2-) Lt; / RTI > The reduced oxygen ions move to the cathode through the electrolyte membrane, and hydrogen (H ₂ ), hydrogenated carbon (HC) introduced into the cathode support and the second functional cathode layer. And carbon monoxide (CO) to generate water (H ₂ O) and carbon dioxide (CO ₂ ), and then emit electrons again. Accordingly, the planar solid oxide fuel cell capable of efficiently producing electricity through an external circuit can be provided.

1 is a flowchart illustrating a method of manufacturing a planar solid oxide fuel cell according to an embodiment of the present invention.
2 is a view for explaining a method of manufacturing a planar solid oxide fuel cell according to an embodiment of the present invention.
3 is a view for explaining a step of forming first and second functional cathode films in a method of manufacturing a planar solid oxide fuel cell according to an embodiment of the present invention.
4 is a view for explaining steps of forming first and second electrolyte films in a method of manufacturing a planar solid oxide fuel cell according to an embodiment of the present invention.
5 is a flowchart illustrating a method of manufacturing a planar solid oxide fuel cell according to a modification of the embodiment of the present invention.
6 is a view for explaining a method of manufacturing a planar solid oxide fuel cell according to a modification of the embodiment of the present invention.
7 is a view for explaining a step of forming first and second electrolyte films in a method of manufacturing a planar solid oxide fuel cell according to a modification of the embodiment of the present invention.
8 is a view showing an actual manufacturing process of a planar solid oxide fuel cell according to an embodiment of the present invention.
FIG. 9 is a view for explaining an example of a fuel cell system for power generation using a planar solid oxide fuel cell according to an embodiment and a modification of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the technical spirit of the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that the disclosure can be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

In this specification, when an element is referred to as being on another element, it may be directly formed on another element, or a third element may be interposed therebetween. Further, in the drawings, the thicknesses of the films and regions are exaggerated for an effective explanation of the technical content.

Also, while the terms first, second, third, etc. in the various embodiments of the present disclosure are used to describe various components, these components should not be limited by these terms. These terms have only been used to distinguish one component from another. Thus, what is referred to as a first component in any one embodiment may be referred to as a second component in another embodiment. Each embodiment described and exemplified herein also includes its complementary embodiment. Also, in this specification, 'and / or' are used to include at least one of the front and rear components.

The singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It is also to be understood that the terms such as " comprises "or" having "are intended to specify the presence of stated features, integers, Should not be understood to exclude the presence or addition of one or more other elements, elements, or combinations thereof.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 1 is a flow chart for explaining a method of manufacturing a planar solid oxide fuel cell according to an embodiment of the present invention, and FIG. 2 is a view for explaining a method of manufacturing a planar solid oxide fuel cell according to an embodiment of the present invention. And FIGS. 3 to 4 are views for explaining the steps of forming the first and second functional cathode layers and the first and second electrolyte layers in the manufacturing method of the planar solid oxide fuel cell according to the embodiment of the present invention .

1 to 4, there is shown an anode support 100 including a first surface 100a and a second surface 100b opposite the first surface 100a, And the cathode support 100 may be subjected to a first thermal treatment to impart mechanical strength to the cathode support 100 (S100).

The cathode support 100 may include a metal oxide. According to one embodiment, the metal oxide may include at least one of nickel oxide (NiO), Gd-doped ceria (GDC), cerium oxide (CeO ₂ ), and yttria stabilized zirconia (YSZ). Also, according to one embodiment, the cathode support 100 may be manufactured in the form of a thin film by a tape casting process. Specifically, the method for manufacturing the cathode support 100 includes a first physical mixing process, a second physical mixing process, a de-airing process, The tape casting process, and a drying process. For example, the mechanical mixing may be ball milling.

The first mechanical mixing step may include adding a dispersant and a solvent to the metal oxide, and then ball milling the mixed oxide to prepare a first mixed solution. For example, the dispersing agent may be Menhaden fish oil. In addition, the solvent can be used for an organic solvent. For example, the solvent may be ethyl alcohol, or toluene. According to one embodiment, the ethyl alcohol and / or the toluene as the solvent and the Manhattan fish oil as the dispersant are added to the metal oxide, and then ball milled for 24 hours to prepare the first mixed solution .

The second mechanical mixing step may include adding a bonding agent and a plasticizer to the first mixed solution and then ball milling the mixed solution to prepare a second mixed solution. have. The binder may be a vinyl based binder, and the plasticizer may be a phthalate plasticizer. For example, the binder may be PVB (polyvinyl butyral) or PVA (polyvinyl alcohol), and the plasticizer may be selected from the group consisting of Butylbenzyl phthalate (BBP), Dibutyl phthalate (DBP) or Di- . ≪ / RTI > According to one embodiment, the plasticizer BBP and the binder PVB may be added to the first mixed solution, followed by ball milling for 24 hours to prepare the second mixed solution.

The defoaming process may include removing bubbles contained in the second mixed solution. According to one embodiment, the first mixed solution and the bubbles mixed into the second mixed solution can be removed by the vacuum pump through the first and second mechanical mixing processes.

The tape casting step may include manufacturing the cathode support 100 in the form of a thin film having a uniform thickness using the defoamed second mixed solution. According to one embodiment, the thickness of the cathode support may be 500 to 1000 mu m.

The drying step may include removing the solvent contained in the cathode support 100. The type of the dryer used in the drying process is not particularly limited. For example, the dryer may be any one of a vacuum oven, a heater, a hot plate, and a heating coil.

The step of preparing the negative electrode support may further include a first thermal treatment of the negative electrode support to impart mechanical strength to the negative electrode support. By the first heat treatment, the binder and the plasticizer contained in the negative electrode support are removed, so that a slight mechanical force can be applied to the negative electrode support. According to one embodiment, the temperature of the first heat treatment may be higher than the temperature of a second thermal treatment described later. For example, the first heat treatment temperature may be 900 ° C.

A sacrificial layer including an organic compound is formed on the first surface 100a of the cathode support 100 and the first surface 100a of the second surface 100b by the second heat treatment sacrificial film 140 may be formed (S200).

The type of the heater used in the second heat treatment is not particularly limited. For example, the heater may be any one of a heater, a hot plate, and a heating coil. Also, according to one embodiment, the sacrificial membrane may comprise at least one of parafilm and paraffin wax.

After the sacrificial layer 140 is disposed on the cathode support 100, the second heat treatment may be performed. For example, the temperature of the second heat treatment may be 50 캜. By the second heat treatment, at least a part of the sacrificial film 140 may be melted to form a melt film. After the second heat treatment is performed on the cathode support 100 on which the sacrificial layer 140 is disposed, as the temperature is lowered to the room temperature, the molten layer is further transferred to the sacrificial layer 140 in the solid state, Can be phase-changed. The molten film may be phase-changed into the organic film 140 and the organic film 140 may be bonded onto the first surface 100a of the cathode support 100. [ Thus, the sacrificial layer 140 can form a dense bonded interface with the first surface 100a.

According to one embodiment, the parafilm may be disposed on the first surface 100a of the cathode support 140. [ By the second heat treatment, at least a part of the parafilm can be melted, and the molten film can be produced. As the temperature falls to room temperature, the molten film may be bonded onto the first surface 100a of the cathode support 100 while being phase-changed again to the para-film in the solid state.

Also, according to one embodiment, the paraffin wax in the form of powder may be sprayed onto the first surface 100a of the cathode support 100. By the second heat treatment, at least a part of the paraffin wax in powder form can be melted, and the molten film can be produced. As the temperature falls to room temperature, the molten film may be bonded onto the first surface 100a of the cathode support 100 while being phase-changed again to the paraffin wax in the solid state.

According to another embodiment of the present invention, a solution containing organic material is coated on the first surface 100a of the cathode support 100, and then the second surface of the cathode support 100 is coated with a solution containing organic The sacrificial layer 100 may be formed on the sacrificial layer 100a. For example, the organic solution may be prepared by adding an organic binder (e.g., PVB) to a solvent.

The cathode support 100 on which the sacrificial layer 140 is formed is immersed in a first solution 120 to form a first anode functional film 121 on the sacrificial layer 140 And a second anode functional film 122 may be formed on the second surface 100b of the cathode support 100 in operation S300.

The first solution 120 may be a colloidal solution including a metal oxide powder. The first solution 120 may be prepared by mixing the metal oxide powder, the dispersant, the binder, and the plasticizer in an organic solvent. According to one embodiment, the metal oxide powder may be a powder mixed with nickel oxide (NiO) and GDC (Gd-doped ceria), or a mixture of nickel oxide (NiO) and YSZ (Yttria Stabilized Zirconia) . Also, according to one embodiment, the dispersing agent may be mannan or fish oil, and the binder may be polyvinyl butyral (PVB), and the plasticizer may be BBP (Butylbenzyl phthalate) Ethyl alcohol, and / or toluene. According to an embodiment of the present invention, a mixture of the metal oxide powder NiO and GDC (Gd-doped ceria) and the dispersant Manhaden fish oil are added to the organic solvent and the toluene The mixed solution can be ball milled for 24 hours. Then, polyvinyl butyral (PVB) and butyl benzyl phthalate (BBP) were added to the mixed solution, followed by ball milling for 48 hours to prepare the first solution in a colloid state have.

3, the cathode support 100 formed with the sacrificial layer 140 is immersed in the first solution 120, and the sacrificial layer 140 is formed on the sacrificial layer 140, A film 121 may be formed and the second functional cathode layer 122 may be formed on the second surface 100b of the cathode support 100. [

The thicknesses of the first functional anode layer 121 and the second functional cathode layer 122 may be adjusted according to the concentration of the first solution 120. The concentration of the first solution 120 may be adjusted depending on the amount of the metal oxide powder, the dispersant, the binder, and / or the plasticizer added to the organic solvent. According to one embodiment, the thicknesses of the first functional anode layer 121 and the second functional cathode layer 122 may be 5 to 20 탆. According to an embodiment of the present invention, when the cathode support 140 formed with the sacrificial layer 140 is repeatedly immersed in the first solution 120 three times, the sacrificial layer 140 and the cathode The thickness of the first functional negative electrode film 121 and the second functional negative electrode film 122 formed on the second surface 100b of the support 140 may be 20 占 퐉.

In addition, the functional cathode films formed on the cathode support 100 by the immersion process may be porous thin films. Unlike the embodiment of the present invention, the functional cathode film formed by the immersion process may have a higher porosity than the functional cathode film formed by the laminating process. Accordingly, when heat is supplied to the first functional negative electrode layer 121 and the second functional negative electrode layer 122, the first functional negative electrode layer 121 and the second functional negative electrode layer 122 are formed, By the void, the phenomenon that the first functional negative electrode film 121 and the second functional negative electrode film 122 are contracted by heat can be minimized.

In addition, the functional cathode films formed on the cathode support 100 by the immersion process can form a dense bonded interface with the cathode support 100. Accordingly, the functional cathode films according to the embodiments of the present invention can provide a richer triple phase boundary. The three-phase interface may be a contact where hydrogen (H ₂ ), hydrocarbon (CH 3) gas, and carbon monoxide (CO), which are reaction materials in the fuel cell, meet at the same time with oxygen ions (O ^2- ) moved through the electrolyte membrane.

The first functional negative electrode layer 121 and the negative electrode support 100 on which the second functional negative electrode layer 122 is formed are immersed in a second solution 150 to form the first functional negative electrode layer 121, And a second electrolyte film 152 may be formed on the second functional cathode layer 122 in operation S400. The first electrolyte layer 151 may be formed on the second functional anode layer 122.

The second solution 150 may be a colloidal solution including a metal oxide powder, like the first solution 120. The second solution 150 may be prepared by mixing the metal oxide powder, the dispersant, the binder, and the plasticizer in an organic solvent. According to one embodiment, the metal oxide powder may be GDC (Gd-doped Ceria) powder or YSZ (Yttria Stabilized Zirconia) powder. Also, according to one embodiment, the dispersing agent may be mannan or fish oil, and the binder may be polyvinyl butyral (PVB), and the plasticizer may be BBP (Butylbenzyl phthalate) Ethyl alcohol, and / or alpa-terpineol. According to one embodiment, the GDC powder as the metal oxide powder and the mixed solution of Manhaden fish oil as the dispersant added to the ethyl alcohol and alpa-terpineol as the organic solvent can be ball-milled for 24 hours . Thereafter, PVB (polyvinyl butyral) as the binder and BBP (butyl benzyl phthalate) as the plasticizer were added to the mixed solution, followed by ball milling for 48 hours so that the second solution 150 in a colloid state .

4, the cathode support 100 having the first functional cathode layer 121 and the second functional cathode layer 122 formed thereon is immersed in the second solution 150, The first electrolyte layer 151 and the second electrolyte layer 152 may be formed on the first functional negative electrode layer 121 and the second functional negative electrode layer 122, respectively. The thicknesses of the first electrolyte membrane 151 and the second electrolyte membrane 152, such as the first functional anode layer 121 and the second functional cathode layer 122 described with reference to FIG. 3, May be adjusted according to the concentration of the second solution (150). According to one embodiment, the thickness of the first electrolyte layer 151 and the second electrolyte layer 152 may be 5 to 20 占 퐉. According to an embodiment of the present invention, the anode support 140 having the first functional cathode layer 121 and the second functional cathode layer 122 formed thereon may be repeatedly applied to the second solution 150 three times The first electrolyte layer 151 and the second electrolyte layer 152 having a thickness of 20 mu m are formed on the first functional negative electrode layer 121 and the second functional negative electrode layer 122, .

Also, the first electrolyte layer 151 and the second electrolyte layer 152 formed on the cathode support 100 by the immersion process may be a dense thin film.

Accordingly, the oxygen ion (O ^2- ) generated by reducing oxygen (O ₂ ) introduced into the cathode (cathode) 170 of the planar solid oxide fuel cell according to the embodiment of the present invention from the outside is reduced 2 electrolyte membrane 152 to the three-phase interface of the second functional cathode layer 122 in the planar solid oxide fuel cell.

As described above, the second electrolyte membrane 152 formed on the second surface 100b of the cathode support 100 by the immersion process may be a dense thin film. Accordingly, hydrogen (H ₂ ), hydrocarbon (CH 3), and carbon monoxide (CO) introduced into the cathode of the planar solid oxide fuel cell from the outside are removed from the oxygen ions introduced through the second electrolyte membrane 152 O ^{2 -} ) to generate water (H ₂ O) and carbon dioxide (CO ₂ ), and to emit electrons.

The sacrifice layer 140, the first functional cathode layer 121, and the first electrolyte layer (not shown) on the first surface 100a of the cathode support 100 are subjected to a third thermal treatment 151 may be removed (S500).

The type of the heater used in the third heat treatment is not particularly limited. For example, the heater may be any one of an electric oven, a heater, a hot plate, and a heating coil. The third heat treatment temperature may be higher than the second heat treatment temperature. According to one embodiment, the temperature of the third heat treatment may be 400 to 900 ° C.

By the third heat treatment, the sacrificial layer 140 may be burned-out. In other words, the sacrificial film 140 formed on the first surface 100a of the cathode support 100 can be burned and removed by the third heat treatment. As the sacrificial layer 140 formed on the first surface 100a of the cathode support 100 is removed, the first functional negative electrode layer 121 formed on the sacrificial layer, The sacrificial layer 151 may be easily removed together with the sacrificial layer 140.

The sacrificial layer 140, the first functional cathode layer 121, and the first electrolyte layer (not shown) formed on the first surface 100a of the cathode support 100 may be formed by the third heat treatment, 151 may be removed and heat may be supplied to the cathode support 100, the second functional cathode layer 122, and the second electrolyte layer 152 to be partially sintered. Accordingly, the mechanical strength of the cathode support 100, the second functional cathode layer 122, and the second electrolyte layer 152 can be improved. The cathode support 100, the second functional cathode layer 122 and the second electrolyte layer 152 are partially sintered by the third heat treatment to form the cathode support 100, The structure of the functional negative electrode film 122 and the second electrolyte film 152 becomes more dense and the particles contained in the second functional negative electrode film 122 can be refined. Particularly, due to the fine particles contained in the second functional cathode layer 122, the reactants (hydrogen (H ₂ ), hydrocarbon (CH), carbon monoxide (CO), and oxygen The three-phase interface formed by the contact of the second functional cathode layer 122 and the second electrolyte layer 152 where the oxidation and reduction reaction of the ions (O &^lt; ^2- &^gt;) occurs takes place. Accordingly, the reactants (hydrogen (H ₂ ), hydrocarbon (CH 3) gas, carbon monoxide (CO ₂ ), and the like), which have reached the three-phase interface through the second functional cathode layer 122 and the second electrolyte layer 152, ), And the oxygen ion (O &^lt; ^2- >)) can be improved.

The sacrificial layer 140 is formed on the surface of the cathode support 100 in order to remove the sacrificial layer 140 from the anode support 100. However, May be removed by an organic solvent.

As described above, the sacrificial layer 140, the first functional cathode layer 121, and the second electrolyte layer 152 are removed by the third heat treatment, and the cathode support 100, A second half-cell having a structure in which the second functional cathode layer 122 and the second electrolyte layer 152 are stacked in this order can be manufactured.

The cathode support 100, the second functional cathode layer 122, and the second electrolyte layer 152, which are stacked in order before the anode 170 is formed on the second electrolyte layer 152, And then sintered by a fourth thermal treatment to form a dense film (S600).

According to one embodiment, the temperature of the fourth heat treatment may be 1400 to 1500 ° C. Also, according to one embodiment, the heater used in the fourth heat treatment may be an electric oven.

A paste type cathode material may be provided on the densified second electrolyte film 152 to form a cathode film (S700).

According to one embodiment, the positive electrode film is made of LSCF (La _0.6 Sr _0.4 Co _0.2 Fe _0.8 O ₃ -δ) -GDC (Gd-doped Ceria) or LSM (La _0.8 Sr _0.2 MnO ₃ -δ) -YSZ Stabilized Zirconia). Also, according to one embodiment, the anode film may be formed on the second electrolyte film 152 by a screen printing process. Specifically, the LSCF-GDC or LSM-YSZ paste is coated on the second electrolyte membrane 152 by the screen printing process, and then the solvent contained in the paste is removed through a drying and heating process , The positive electrode film may be formed on the second electrolyte film 152.

The cathode film may be subjected to a fifth thermal treatment so that a porous cathode 170 may be formed (S800).

Oxygen (O ₂ ) introduced into the anode 170 from the outside can easily move through the anode 170 by a void formed in the anode 170.

Unlike the embodiments of the present invention described above, according to a modification of the embodiment of the present invention, a functional cathode film may be formed on a cathode support by a tape casting process. In other words, the process of forming a functional negative electrode film using a dip coating process on a negative electrode support may be replaced with a process of forming a functional negative electrode film using a tape casting process on a negative electrode support. A method of manufacturing a planar solid oxide fuel cell according to a modification of the embodiment of the present invention will be described with reference to FIGS. 5 and 6. FIG.

FIG. 5 is a flowchart illustrating a method of manufacturing a planar solid oxide fuel cell according to a modification of the embodiment of the present invention. FIG. 6 is a plan view of a planar solid oxide fuel cell according to a modification of the embodiment of the present invention. 7 is a view for explaining a step of forming first and second electrolyte films in a method of manufacturing a planar solid oxide fuel cell according to a modification of the embodiment of the present invention .

5 and 6, a cathode support 100 including a first surface 100a and a second surface 100b facing the first surface 100a may be prepared (S1100).

As described with reference to FIGS. 1 and 2, the cathode support 100 may include a metal oxide, and may be manufactured in a thin film form by a tape casting process. According to one embodiment, the thickness of the cathode support 100 may be 500 to 1000 탆.

A functional negative electrode film 121a is formed on the first surface 100a of the first surface 100a and the second surface 100b of the negative electrode support 100 by laminating, The negative electrode support 100 and the functional negative electrode film 121a may be subjected to the first heat treatment to impart mechanical strength to the functional negative electrode film 100 and the functional negative electrode film 121a.

The functional cathode film 121a may be manufactured by the tape casting process. In other words, the functional negative electrode film 121a may be manufactured in the same manner as the negative electrode support 100. As described with reference to FIGS. 1, 2, and 3, a first solution 120 in the form of a colloid comprising a metal oxide powder may be prepared. The first solution 120 is subjected to the tape casting process so that the functional negative electrode film 121a having a uniform thickness can be manufactured. After the functional cathode layer 121a is disposed on the cathode support 100, the cathode support 100 and the functional cathode layer 121 may be disposed between the heated metal plates. Heat and pressure are applied to the cathode support 100 and the functional cathode 121a from the heated metal plates so that the cathode support 100 and the functional cathode layer 212a can be laminated. According to one embodiment, the temperature of the heated metal plates may be 80 ° C.

Also, the cathode support 100 and the functional cathode 121a laminated may be pre-sintered by the first heat treatment. The first heat treatment temperature may be 900 캜. Also, according to one embodiment, the heater used in the first heat treatment may be an electric oven.

The first heat treatment may be further performed after the step of preparing the cathode support 100 disclosed in step S1100. In other words, in order to impart the mechanical strength to the cathode support 100, after the first heat treatment is primarily performed with respect to the cathode support 100, the cathode support 100 is formed on the cathode support 100 After the functional negative electrode film 121a is formed, the negative electrode substrate 100 and the functional negative electrode film 121a may be subjected to the above-described process for imparting mechanical strength to the negative electrode substrate 100 and the functional negative electrode film 121a. The first heat treatment may be performed secondarily.

A sacrificial film 140 containing organic matter is formed on the first surface 100a of the cathode support 100 and the second surface 100b of the second surface 100b by the second heat treatment (S1300).

As described with reference to FIGS. 1 and 2, after the sacrificial layer 140 is disposed on the cathode support 100, at least a part of the sacrificial layer 140 is melted by the second heat treatment So that a molten film can be produced. As the temperature is lowered to room temperature, the molten film is further phase-changed into the sacrificial layer 140 in a solid state, and the sacrificial layer 140 is formed on the second surface 100b of the cathode support 100 Can be bonded. According to one embodiment, the temperature of the second heat treatment may be 50 ° C.

The functional anode layer 121a and the cathode support 100 formed with the sacrificial layer 140 are immersed in the electrolyte solution 150 to form a first electrolyte layer 151 on the functional cathode layer 121a And a second electrolyte layer 152 may be formed on the sacrificial layer 140 (S1400).

The electrolyte solution 150 may be prepared in the same manner as the second solution 150 described with reference to FIGS. 1, 2, and 4. Accordingly, the electrolyte solution 150 may be a colloidal solution containing a metal oxide powder. 7, the functional negative electrode layer 121a and the negative electrode support 100 having the sacrificial layer 140 are immersed in the electrolyte solution 150 to form the functional negative electrode layer 121a and the sacrificial layer 140, The first electrolyte layer 151 and the second electrolyte layer 152 may be formed on the first electrode layer 140. As described above, the thickness of the first electrolyte layer 151 and the second electrolyte layer 152 can be adjusted according to the concentration of the second solution 150. According to one embodiment, the thickness of the first electrolyte layer 151 and the second electrolyte layer 152 may be 5 to 20 占 퐉.

The negative electrode support 100 is immersed in the second solution 150 so that the first electrolyte electrode 151 and the second electrolyte membrane 152 formed on the negative electrode support 100 are electrically connected to the third and fourth electrodes 150, 4 After the heat treatment, it can have a dense structure. Accordingly, the oxygen ions (O ^2- ) generated by reducing oxygen (O ₂ ) introduced into the anode (170) of the planar solid oxide fuel cell according to the embodiment of the present invention from the outside are supplied to the first electrolyte membrane 151 to the three-phase interface in the functional cathode layer 121a of the planar solid oxide fuel cell. In other words, due to the dense structure of the first electrolyte membrane 151 formed on the first surface 100a of the cathode support 100, the hydrogen (H ₂₎ at the three phase interface in the planar solid oxide fuel cell ), Hydrocarbon (CH 3) gas, and carbon monoxide (CO) and oxygen ions (O ^2- ) can be improved.

The sacrificial layer 140 and the second electrolyte layer 152 on the second surface 100b of the cathode support 100 may be removed by a third heat treatment in operation S1500.

As described with reference to FIGS. 1 and 2, by the third heat treatment, the sacrificial film 140 can burn out. As the sacrificial layer 140 formed on the second surface 100b of the cathode support 100 is removed, the second electrolyte layer 152 formed on the sacrificial layer 140 is removed from the sacrificial layer 140, Can be easily removed together with the gasket 140.

The sacrificial layer 140 and the second electrolyte layer 152 formed on the second surface 100b of the negative electrode support 100 are removed by the third heat treatment, The functional anode layer 100, the functional cathode layer 121a, and the first electrolyte layer 151 may be partially sintered. Accordingly, the mechanical strength of the cathode support 100, the functional cathode layer 121a, and the first electrolyte layer 151 can be improved.

By the fourth heat treatment, the first electrolyte film 151 may be formed as a dense film (S1600).

As described above, according to one embodiment, the temperature of the fourth heat treatment may be 1400 to 1500 ° C, and the heater used for the fourth heat treatment may be electric oven.

Due to the dense structure of the first electrolyte layer 151 and the fine particles contained in the functional cathode layer 121a, the reactants (hydrogen (H ₂ ), hydrocarbon (CH) The interface between the functional anode layer 121a and the first electrolyte layer 151 where the reaction of the gas, carbon monoxide (CO), and oxygen ions (O ^2- ) may occur may increase. Accordingly, the reaction efficiency of the reaction materials (hydrogen (H ₂ ), hydrocarbon (CH) gas, carbon monoxide (CO), oxygen ions (O ^2- )) at the three phase interface can be improved.

A paste type cathode material may be provided on the densified first electrolyte film 151 to form a cathode film S1700.

As described with reference to FIGS. 1 and 2, the positive electrode film may be formed on the first electrolyte film 151 by the screen printing process. Specifically, the LSCF-GDC or LSM-YSZ paste is coated on the first electrolyte membrane 151 by the screen printing process, and then the solvent and the solvent contained in the paste are dried and heated So that the positive electrode film may be formed on the first electrolyte film 151.

The cathode film may be subjected to a fifth thermal treatment to form a porous cathode 170 (S1800).

As described above, oxygen (O ₂ ) introduced from the outside into the anode 170 can be easily moved inside the anode 170 by the cavity formed in the anode 170.

Unlike the above-described embodiments and modifications of the present invention, when a flat plate type solid oxide fuel cell is manufactured by a laminating process, a negative electrode support in the form of a green tape, a functional cathode film, And an electrolyte membrane. Thereafter, the laminated cathode support, the functional cathode membrane, and the electrolyte membrane are bonded to each other and co-fired to form a half-cell of the planar solid oxide fuel cell using the laminating process. . Wherein the negative electrode substrate, the functional negative electrode film, and the electrolyte membrane have different coefficient of expansion, and the shrinkage of the negative electrode substrate, the functional negative electrode film, and the electrolyte membrane during the heat- can be different. As a result, it is not easy to bond the negative electrode support, the functional negative electrode film, and the electrolyte membrane, and cracks and warpage phenomena occur in the negative electrode support, the functional negative electrode film, Can occur.

In addition, when the electrolyte membrane is formed using spin coating or spraying only on one surface of the functional negative electrode, it is difficult to mass-produce the planar solid oxide fuel cell.

However, as described above, according to an embodiment of the present invention, a sacrificial layer 140 including organic material may be formed on the first surface 100 of the cathode support 100. The sacrificial layer 140 is formed on the sacrificial layer 140 and the second surface 100b of the negative electrode support 100 by the step of immersing the negative electrode support 100 on which the sacrificial layer 140 is formed in the first solution 120. [ The first functional negative electrode film 121 and the second functional negative electrode film 122 may be formed. The negative electrode substrate 100 on which the first functional negative electrode film 121 and the second functional negative electrode film 122 are formed is immersed in the second solution 150 to form the first functional negative electrode film 121, The first electrolyte layer 151 and the second electrolyte layer 152 may be formed on the functional negative electrode layer 122. The sacrificial layer 140, the first functional cathode layer 121, and the first electrolyte layer 151 on the first surface 100a of the cathode support 100 are removed by the second heat treatment . The anode 170 is formed on the second electrolyte film 152 by a tape casting process to produce a planar solid oxide fuel cell according to an embodiment of the present invention.

The structures of the first and second electrolyte films 151 and 152 formed on the cathode support 100 by the immersion process may be dense by the fourth heat treatment process. Accordingly, the lithium ion secondary battery according to the embodiment of the present invention is formed from the cathode of the planar solid oxide fuel cell according to the present invention and reacts with the electrons 2e ^- introduced into the anode 170, Oxygen (O ₂ ) is reduced at the interface to generate oxygen ions (O ^2- ), and the ionized oxygen easily moves through the dense second electrolyte membrane 152, and the cathode (H ₂ O) or carbon dioxide (CO ₂ ) by reacting with hydrogen (H ₂ ), hydrocarbon (CH 3), carbon monoxide An oxide fuel cell can be provided

In addition, when the planar solid oxide fuel cell is manufactured by the dip coating process instead of the laminating process, the production yield of the planar solid oxide fuel cell is improved and the difficulty of mass production can be solved. The concentration of the first solution 120 and the concentration of the second solution 150 may be different from the concentration of the second functional anode layer 122 and the second electrolyte layer 152 formed on the cathode support 100, Can be easily adjusted. By adjusting the thicknesses of the second functional anode layer 122 and the second electrolyte layer 152, the second functional cathode layer 122 and the second electrolyte layer 152 formed by the third and fourth heat- The second functional cathode layer 122 and the second electrolyte layer 152 by the third and fourth heat treatments by easily controlling the shrinkage ratio of the cathode active material layer 152 And warpage can be minimized.

According to another modification of the present invention, an electrolyte membrane may be formed on the functional negative electrode film by the laminating process, unlike the embodiment of the present invention described with reference to FIGS. 1 to 4 above. In other words, a functional negative electrode film is formed on the negative electrode support using an immersion process according to an embodiment of the present invention described with reference to FIGS. 1 to 4, and an electrolyte membrane is formed on the functional negative electrode film using an immersion process The step of forming the electrolyte membrane on the functional negative electrode layer using an immersion process may be replaced with a step of forming the electrolyte membrane on the functional negative electrode layer by using a laminating process.

More specifically, a cathode support 100 is prepared, and a first heat treatment may be performed on the cathode support 100 to impart mechanical strength to the cathode support 100. A sacrificial layer 140 may be formed on the first surface 100a of the cathode support 100 by a second heat treatment and the cathode support 100 on which the sacrificial layer 140 is formed may be formed by a first heat treatment, The first functional negative electrode layer 121 is formed on the sacrificial layer 140 and the second functional negative electrode layer 122 is formed on the second surface 100b of the negative electrode support layer 100, Can be formed together. The method of forming the sacrificial layer 140 and the first and second functional cathode layers 121 and 122 is similar to that of the sacrificial layer 140 and the first and second functional cathodes 140 and 142 described with reference to FIGS. May be the same as the method in which the films 121 and 122 are formed.

The sacrificial layer 140 and the first functional negative electrode layer 121 on the first surface 100a of the negative electrode support 100 can be removed by the third heat treatment. As described with reference to FIGS. 1 and 2, the sacrificial layer 140 is burned out by the third heat treatment, and the first functional negative electrode layer 121 formed on the sacrificial layer 140 Can be easily removed together with the sacrificial film 140. [ Also, by the third heat treatment, the second functional cathode layer 121 formed on the second surface 100b of the cathode support 100 can be partially sintered. According to one embodiment, as described above, the first and third heat treatment temperatures may be higher than the second heat treatment temperature.

An electrolyte membrane may be formed on the second functional cathode layer 122 by laminating. As described with reference to FIGS. 1, 2, and 3, a second solution 150 in the form of a colloid containing a metal oxide powder may be prepared. The second solution 150 is subjected to the tape casting process so that the electrolyte membrane having a uniform thickness can be produced. 5 and 6, the electrolyte membrane is formed on the second functional negative electrode film 122, and the negative electrode support 100, the second functional negative electrode film 122), and a half-cell having a structure in which the electrolyte membrane is sequentially stacked.

According to another modification of the present invention, the step of removing the sacrificial layer 140 and the first functional negative electrode layer 121 by the third heat treatment, unlike the other modified embodiments of the present invention, May be performed after the step of forming the electrolyte membrane on the second functional cathode film 122. In other words, after the first and second functional cathode films 121 and 122 are formed on the cathode support 100 on which the sacrificial layer 140 is formed by the immersion process, 2 electrolyte membrane may be formed on the functional negative electrode film 122. The sacrificial layer 140 and the first functional negative electrode layer 121 on the first surface 100a of the negative electrode support 100 are removed by the third heat treatment to form the negative electrode support 100, The second functional cathode layer 122, and the electrolyte layer may be sequentially stacked on a substrate.

Hereinafter, an actual manufacturing process of a lab scale of a planar solid oxide fuel cell according to an embodiment of the present invention will be described

8 is a view showing an actual manufacturing process of a planar solid oxide fuel cell according to an embodiment of the present invention. 8 (a) and 8 (b) are images showing a step of manufacturing a negative electrode support in a manufacturing process of a planar solid oxide fuel cell according to an embodiment of the present invention, and FIG. 8 (c) FIG. 8 (d) is an enlarged sectional view of a planar solid oxide fuel cell according to an embodiment of the present invention. FIG. 8 FIG. 8 (e) is a view for explaining a step of forming the first functional negative electrode film and the second functional negative electrode film in the manufacturing process of the planar solid oxide fuel cell according to the embodiment of the present invention, FIG. 8 (f) is a view for explaining a step of removing the sacrificial film during the manufacturing process of the planar solid oxide fuel cell according to the embodiment of the present invention FIG. 8 (g) is an image for explaining the pre-sintering process in the manufacturing process of the planar solid oxide fuel cell according to the embodiment of the present invention, and FIG. 8 (h) 5A is an image for explaining a step of sintering an electrolyte in a manufacturing process of a planar solid oxide fuel cell according to an example, and then manufacturing a positive electrode thereon.

8 (a) and 8 (b), a negative electrode support having a thickness of about 500 to 1000 袖 m was produced through a tape casting process. Specifically, NiO powder, GDC powder and a dispersant (Menhaden Fish Oil) were added to a mixed solution of ethyl alcohol and toluene as an organic solvent, followed by ball milling for 24 hours to prepare a first mixed solution. A binder (PVB) and a plasticizer (BBP) were added to the first mixed solution, followed by ball milling for 24 hours to prepare a second mixed solution. A defoaming process was performed using a vacuum pump to remove bubbles mixed in the second mixed solution by the ball milling process. The negative electrode support in the form of a green tape having a thickness of about 500 to 1000 mu m was then prepared by tape casting process. The binder and the plasticizer were removed from the green cathode support and the first heat treatment was performed at a temperature of 900 ° C to impart mechanical strength to the anode support.

Referring to FIG. 8 (c), a sacrificial film was formed on the first surface of the cathode support through a second heat treatment. Specifically, a parafilm was placed on the first side of the cathode support and heated to a temperature of about 50 캜 or higher. The parafilm was melted on the first side of the cathode support to form a molten film. Thereafter, the temperature was lowered to room temperature, and the molten film was again phase-changed into the parafilm in a solid state, and was bonded to the first surface of the negative electrode support.

Referring to FIG. 8 (d), a first functional negative electrode layer and a second functional negative electrode layer are formed on the sacrificial layer and the second surface of the negative electrode support through a dip coating process in which the negative electrode support having the sacrificial layer formed thereon is dipped in the first solution. 2 functional cathode films were formed. Specifically, 50 g of NiO-GDC mixed powder having a smaller particle size than NiO powder and GDC powder used in the cathode support manufacturing process, and 200 g of 0.5 g of a dispersant (Menhaden Fish Oil) were added to ethyl alcohol as an organic solvent , And ball milled for 24 hours. Then, 5 g of binder (PVB) was added, followed by ball milling for 48 hours to prepare the first solution in the colloidal state. The negative electrode substrate on which the sacrificial film is formed is immersed in the first solution to form the first functional negative electrode film and the second functional negative electrode film having a thickness of 5 to 20 mu m on the second surface of the sacrificial film and the negative electrode support, .

Referring to FIG. 8 (e), the first functional negative electrode layer and the second functional negative electrode layer are formed by a dip coating process in which the negative electrode support is immersed in a second solution, A first electrolyte membrane and a second electrolyte membrane were prepared on the functional negative electrode film. Specifically, 50 g of GDC powder and 0.5 g of dispersant (Menhaden Fish Oil) were added to a mixed solution of 200 g of ethyl alcohol and 50 g of alpa-terpineol, followed by ball milling for 24 hours. Then, 5 g of the binder (PVB) and 1 g of the dispersant (BBP) were added, followed by ball milling for 48 hours to prepare the second solution in the colloidal state. The first and second electrolyte membranes were prepared by immersing the anode support in which the first functional cathode layer and the second functional cathode layer were formed in the second solution.

Referring to FIG. 8 (f), the sacrificial layer, the first functional cathode layer, and the first electrolyte layer on the first surface of the cathode support were removed through a third heat treatment. Specifically, the third heat treatment was performed at a temperature of 400 to 900 캜 using an electric oven to burn-out the sacrificial layer on the first surface of the negative electrode support to destroy the sacrificial layer. The sacrificial film on the first surface of the negative electrode support was removed and the first functional negative electrode film and the first electrolyte film formed on the sacrificial film were removed together.

Referring to (g) of FIG. 8, the cathode support, the second functional cathode layer, and the second electrolyte layer, which are sequentially stacked, are sintered through a fourth heat treatment step. Specifically, the cathode support, the second functional cathode layer, and the second electrolyte layer were densified by the heat treatment at a temperature of 1400 to 1500 ° C using the electric furnace.

Referring to FIG. 8 (h), a cathode was formed on the second electrolyte membrane through the screen printing process. Specifically, through a screen printing process, 25 g of LSCF-GDC powder and 1 wt% of a dispersant (Menhaden Fish Oil) were added to ethyl alcohol as an organic solvent, followed by ball milling. After the addition of a binder (PVB), a plasticizer (BBP) and alfa-Terpineol, a high molecular weight solvent, ethyl alcohol as a relatively low molecular weight organic solvent was evaporated through a centrifugal mixing process to obtain LSCF- GDC paste . Through the screen printing process, the LSCF-GDC paste was coated on the second electrolyte membrane and then dried. Then, the substrate was subjected to a heat treatment at a temperature of 1100 to 1300 ° C through a fifth heat treatment step to produce a planar solid oxide fuel cell according to an embodiment of the present invention.

FIG. 9 is a view for explaining an example of a fuel cell system for power generation using a planar solid oxide fuel cell according to an embodiment and a modification of the present invention.

Referring to FIG. 9, the power generation fuel cell system 1000 includes a planar solid oxide fuel cell 300 and a planar solid oxide fuel cell 300 manufactured according to an embodiment or a modified example of the present invention. And a power control device 800 that receives and supplies the power to the outside. The power control device 800 may include an output device 810, a power storage device 820, a charge / discharge control device 830, and a system control device 840. The output device 810 may include a power inverter 812.

The power conditioning system (PCS) 812 may be an inverter for converting a direct current from the planar solid oxide fuel cell 300 into an alternating current. The charge and discharge control device 830 stores the electric power from the planar solid oxide fuel cell 300 in the power storage device 820 or the electric power stored in the power storage device 820 to the output device 810 Can be output. The system controller 840 may control the output device 810, the power storage device 820, and the charge / discharge control device 830.

As described above, the converted alternating current can be supplied to various AC loads 910 such as an automobile, a home, and the like. Furthermore, the output device 810 may further include a grid connect system 814. The grid connection device 814 can transmit power to the outside through a connection with another power system 920.

As described above, in the planar solid oxide fuel cell according to the embodiment of the present invention, after the sacrificial film is formed on the first surface of the anode support, the sacrificial film and the second surface The first and second functional cathode films and the first and second electrolyte films can be formed on the substrate. The first functional negative electrode layer and the first electrolyte layer on the sacrificial layer may be removed together by burning out the sacrificial layer formed on the first surface of the negative electrode support through heat treatment. Accordingly, it is possible to form the first functional negative electrode film and the first electrolyte film on the first surface of the plurality of cathode supports through the immersion process, which is simple in process. Therefore, in the planar solid oxide fuel cell The production yield can be improved. In addition, the first functional negative electrode layer and the first electrolyte layer formed on the negative electrode support by the immersion process may be thin films each of which is densely bonded to each other. Accordingly, oxygen (O ₂ ) flowing from the outside into the anode of the planar solid oxide fuel cell reacts with electrons and reacts with oxygen ions (O ^2- ) to form a second electrolyte of the cathode through the dense second electrolyte membrane, (H ₂ ) or hydrocarbon (CH) introduced into the cathode to form H ₂ O or CO _2, and which emits electrons to the cathode. Type solid oxide fuel cell can be provided.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments. It will also be appreciated that many modifications and variations will be apparent to those skilled in the art without departing from the scope of the invention.

100: cathode support
100a: first side of the cathode support
100b: second face of the cathode support
120: First solution
121, 121a: a first functional cathode film
122: second functional cathode film
140: sacrificial membrane
150: second solution, electrolyte solution
151: First electrolyte membrane
152: Second electrolyte membrane
170: anode
200: container
300: Plate-type solid oxide fuel cell
800: Power control device
810: Output device
812: Power conversion device
814: Grid connection
820: Power storage device
830: charge / discharge control device
840: System control device
910: AC load
920: Other power systems
1000: Fuel cell system for power generation

Claims (17)

Preparing an anode support comprising a first surface and a second surface opposite the first surface;
Forming a sacrificial film comprising an organic compound on the first side of the cathode support and the second side of the cathode support by a second thermal treatment;
Forming a first anode functional film on the sacrificial layer by dipping the negative electrode support on which the sacrificial layer is formed in a first solution to form a first anode functional film on the sacrificial layer, Forming a first anode functional film and a second anode functional film together;
A first electrolyte membrane is formed on the first functional negative electrode layer by dipping the negative electrode support in which the first functional negative electrode layer and the second functional negative electrode layer are formed in a second solution, Forming a second electrolyte film on the second functional negative electrode layer; And
And removing the sacrificial layer, the first functional cathode layer, and the first electrolyte layer on the first surface of the cathode support by a third thermal treatment. Gt;
The method according to claim 1,
By the second heat treatment, at least a part of the sacrificial film is melted to produce a melt film,
Wherein the molten film is phase-changed to the sacrificial film in a solid state as the temperature is lowered to room temperature, and is bonded onto the first surface of the cathode support. Gt;
The method according to claim 1,
Wherein the step of removing the sacrificial layer, the first functional cathode layer, and the first electrolyte layer on the first surface of the cathode support comprises:
Wherein the sacrificial layer is burned out by the third heat treatment to remove the sacrificial layer and the first functional cathode layer and the first electrolyte layer on the sacrificial layer together, A method of manufacturing a fuel cell.
The method according to claim 1,
The sacrificial layer, the first functional cathode layer, and the first electrolyte layer are removed by the third heat treatment, and the cathode support, the second functional cathode layer, and the second electrolyte layer are partially sintered ). ≪ / RTI >
The method according to claim 1,
Wherein preparing the cathode support comprises:
Further comprising first thermal treating the cathode support to impart mechanical strength to the cathode support. ≪ RTI ID = 0.0 > 11. < / RTI >
6. The method of claim 5,
Wherein the first and third heat treatment temperatures are higher than the second heat treatment temperature.
The method according to claim 1,
Wherein the first solution and the second solution are colloidal solutions comprising a metal oxide powder. The method of claim 1, wherein the first solution is a colloidal solution.
The method according to claim 1,
Wherein the thickness of the functional cathode layers and the electrolyte layers formed on the cathode support is controlled according to the concentration of the first solution and the second solution.
The method according to claim 1,
Wherein the first electrolyte layer and the second electrolyte layer formed by dipping the anode support in the second solution are dense thin films.
The method according to claim 1,
Wherein the sacrificial film comprises at least one of parafilm and paraffin wax.
Preparing a cathode support comprising a first side and a second side opposite the first side;
Forming a functional cathode film on the first side of the cathode support and the first side of the cathode support by laminating;
Forming a sacrificial film containing organic on the first surface of the cathode support and the second surface of the second surface by a second heat treatment;
Immersing the functional negative electrode layer and the negative electrode support on which the sacrificial layer is formed in an electrolyte solution to form a first electrolyte layer on the functional negative electrode layer and forming a second electrolyte layer on the sacrificial layer; And
And removing the sacrificial film and the second electrolyte film on the second surface of the negative electrode support by a third heat treatment.
12. The method of claim 11,
Wherein the step of removing the sacrificial layer and the second electrolyte layer on the cathode support comprises:
Wherein the sacrificial layer is burnt out by the third heat treatment to remove the sacrificial layer and the second electrolyte layer on the sacrificial layer together.
12. The method of claim 11,
Wherein the sacrificial layer and the first electrolyte layer are removed by the third heat treatment, and the cathode support and the functional cathode layer are partially sintered.
12. The method of claim 11,
Wherein the first electrolyte layer and the second electrolyte layer formed by dipping the anode support in the electrolyte solution are dense thin films.
Preparing a cathode support comprising a first side and a second side opposite the first side;
Forming a sacrificial film containing organic matter on the first surface of the cathode support and the second surface of the cathode support by a second heat treatment;
Immersing the negative electrode support on which the sacrificial film is formed in a first solution to form a first functional negative electrode film on the sacrificial film and a second functional negative electrode film on a second surface of the negative electrode support; And
Removing the sacrificial film and the first functional cathode film on the first surface of the cathode support by a third heat treatment; And
And forming an electrolyte membrane on the second functional cathode layer by laminating the anode active material layer and the cathode active material layer.
16. The method of claim 15,
The step of removing the sacrificial film and the first functional negative electrode film by the third heat treatment may include a step of removing the sacrificial film and the first functional negative electrode film by the laminated solid oxide film before or after the step of forming the electrolyte film on the second functional negative electrode film by the laminating A method of manufacturing a fuel cell.
16. The method of claim 15,
Wherein the sacrificial film and the first functional negative film are removed by the third heat treatment and the second functional negative film is partially sintered.

Images