JP3508100B2 - Solid polymer electrolyte fuel cell and method of manufacturing the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid polymer electrolyte fuel cell, a method for producing the fuel cell, and more particularly, a solid polymer electrolyte fuel cell prepared by a specific production method , and
Respect to its preparation, more specifically, a short time and can be prepared by simple means a solid polymer electrolyte fuel cell, and its
And a battery manufacturing technology.

[0002]

2. Description of the Related Art The constitution of a solid polymer electrolyte fuel cell is
It is composed of three elements: an oxygen electrode (cathode) for supplying oxygen, a solid polymer electrolyte, and a fuel electrode (anode) for supplying fuel. In other words, it has a structure in which the gas diffusion electrodes are arranged on both sides of the ion exchange membrane (solid polymer electrolyte membrane).

In this gas diffusion electrode, in a normal state, a reaction gas of an electrolyte and a gas is supplied on the electrode which is a fixed surface to form a three-phase interface, and an electrochemical reaction proceeds at the three-phase interface. To generate electricity, a catalyst,
Composed of carbon black, fluororesin and current collector,
Normally, its thickness is about 0.6 mm, of which 0.5 mm
The structure has a gas feeding layer and a reaction layer of about 0.1 mm.

The performance of this polymer electrolyte fuel cell is determined by how the above-mentioned three-phase (zone) interface is formed, and various proposals have been made regarding the method of forming the three-phase zone interface. Has been done.

The basic method for forming the three-phase band interface is as follows:
A solid polymer electrolyte (fluorine-based ion exchange resin: liquid Nafion manufactured by DuPont, etc.) solution was added to and mixed with the dispersion of carbon black supporting a catalyst, and then a flocculant was added and entwined with the fluororesin. After obtaining a liquid in which a catalyst-supporting carbon black and a fluororesin are mixed, this is used as a liquid for forming a reaction layer, which is applied to a Teflon film or the like and dried to form a reaction layer film. This is a method for obtaining a reaction layer-solid polymer electrolyte assembly by heating and pressing a polymer electrolyte membrane (fluorine-based ion exchange resin: Nafion manufactured by DuPont, etc.), and many proposals for improvement have been made regarding this method. The following are some of them.

A method in which an organic solvent dispersion of carbon powder carrying a noble metal catalyst and an alcohol solution of a solid polymer electrolyte are mixed to form a solid polymer electrolyte in a colloidal form and adsorbed on the carbon powder is applied. Kaihei 10-302805
JP-A-11-4573), a method of applying a dispersion of a catalyst and a solid polymer electrolyte and then treating with an acidic solution (JP-A-11-4573).
No. 0), an ink-like or paste-like catalyst mixture containing a catalyst is applied to the surface of the electrolyte membrane and then the gas diffusion layer is heated and pressed (JP-A 2000-90944), and a purified solid polymer electrolyte swelling is performed. There is a method of using a porous electrolyte having three-dimensionally interconnected pores obtained by applying a polymer electrolyte solution to a membrane and then immersing it in an organic solvent having a polar group (JP 2000-106200 A). .

[0007]

However, all of these methods require complicated steps such as agglomeration, coating, and drying, and the production cost is still high. Therefore, the production cost is lowered and the performance is lowered. At present, there is a strong demand for improvement.

The inventor of the present invention has earnestly studied the problems of the conventional technique, analyzed the process of the conventional technique, and conducted the earnest research on the basis of the analysis result. He studied the means for producing a molecular electrolyte fuel cell, a solid polymer electrolyte membrane, which is a basic element of a solid polymer electrolyte fuel cell, and a gas diffusion electrode.

As a result, the present inventors have found that the solution-state solid polymer electrolyte (fluorine-based ion exchange resin: Nafion solution manufactured by DuPont, etc.) A solid polyelectrolyte dissolved in alcohol at high temperature. Since the zeta potential is negative in the liquid, when an electric field is applied, electrophoresis is performed on the anode side for electrodeposition. Fluororesin fine particles dispersed in water usually have negative ions, so that they adhere to one electrode by electrophoresis and are easily separated from the dispersion medium. Carbon black, which does not show a zeta potential in ethanol and does not cause electrophoresis, does not co-exist with solid polymer electrolyte and fluororesin fine particles during electrophoresis of the solid polyelectrolyte solution and dispersion liquid containing fluororesin fine particles. It was found that the above problems can be solved by applying this knowledge.

An object of the present invention is to provide a solid polymer electrolyte fuel cell which is excellent in mass productivity, can be manufactured inexpensively by a simple apparatus, has high performance, and has a long life, and a manufacturing method thereof.

[0011]

In order to achieve the above object, the invention according to claim 1 of the present invention is a solid polymer electrolyte.
Solid polymer electrolysis consisting of electrolyte membrane, reaction layer and gas supply layer
In a solid fuel cell, the reaction layer is a solid polymer electrolyte
A solid polymer electrolyte fuel cell, characterized in that it is formed on a porous membrane by electrophoresis.

The invention according to claim 4 of the present invention is a solid
Solid high consisting of polymer electrolyte membrane, reaction layer and gas supply layer
In the molecular electrolyte fuel cell, the gas supply layer is electrically
Solids characterized by being formed by electrophoresis
It is a polymer electrolyte fuel cell.

The invention according to claim 6 of the present invention is a solid
Solid high consisting of polymer electrolyte membrane, reaction layer and gas supply layer
In the molecular electrolyte fuel cell, the reaction layer and gas supply
The feed layer is formed by electrophoresis on the solid polymer electrolyte membrane.
Solid polymer electrolyte type fuel characterized by being
It is a charge battery.

The invention according to claim 9 of the present invention provides a joined body of a solid polymer electrolyte membrane and a reaction layer, which is prepared by forming a reaction layer on both surfaces of the solid polymer electrolyte membrane by electrophoresis. A solid polymer electrolyte fuel cell characterized by being sandwiched between two metal plates via carbon paper
It is a method of manufacturing a pond.

[0015] The invention according to claim 11 of the present invention, electrostatic
Solid polymer electrolyte membrane and reaction layer obtained by electrophoresis
It was prepared by heating and pressing two laminated bodies
In addition, the solid polymer electrolyte membrane and reaction layer bonded body was
It is characterized by being sandwiched between two metal plates via a paper
And a method for producing a solid polymer electrolyte fuel cell .

[0016]

In DETAILED DESCRIPTION OF THE INVENTION The present invention, a solid polymer electrolyte membrane constituting a solid polymer electrolyte fuel cell, of the reaction layer and gas supply layer constituting the gas diffusion electrode, the reaction layer is a polymer It is characterized in that it is formed on the electrolyte membrane by electrophoresis. Also this
In the invention, a solid polymer electrolyte fuel cell is constructed.
Reaction layer that constitutes a solid polymer electrolyte membrane and gas diffusion electrode
And the gas supply layer of the gas supply layer is formed by electrophoresis.
It is characterized by being made. Hereinafter, a method for preparing the solid polymer electrolyte membrane, the reaction layer and the gas supply layer by electrophoresis will be described.

The solid polymer electrolyte membrane is prepared by electrophoresis by immersing the cathode and the anode in an electrophoretic solution composed of a solution (hereinafter referred to as a solution) of a solid polymer electrolyte such as Nafion (manufactured by DuPont). A method is performed in which a solid polymer electrolyte is electrophoresed on the anode side by passing an electric current, and is electrodeposited on a substrate installed on or near the anode, specifically, a porous body to form a film.

On the other hand, the preparation of the reaction layer and the gas supply layer constituting the gas diffusion electrode by electrophoresis is also basically prepared by using the above solution. However, the solid polymer electrolyte or fluorine in water is used. A dispersion liquid in which resin fine particles are dispersed (hereinafter,
It is called a dispersion. ), Or a mixed liquid of the solution and the dispersion liquid can be used as the electrophoretic liquid, and in order to form the reaction layer, the electrophoretic liquid contains hydrophobic carbon black,
In the case of the gas supply layer, hydrophilic carbon black, catalyst, metal fine particles or metal oxide fine particles are prepared by dispersing fine particles such as hydrophobic carbon black in an electrophoretic solution and performing electrophoresis.

Examples of the fluororesin used in the electrophoretic solution include tetrafluoroethylene resin, tetrafluoroethylene / hexafluoropropylene copolymer, trifluorochloroethylene resin and perfluoroalkoxy resin.

The fine particles of carbon black or the like to be dispersed in the electrophoretic liquid are preferably adjusted to have a particle size of 1 micron or less. Further, the particle size is set according to the required characteristics, and hydrophobic carbon black or the like is used. As described above, when the dispersibility in water is poor, a particle size of 1 micron or less is dispersed by using a surfactant together with a jet mill.

Electrophoresis basically comprises an electrophoresis tank having an anode and a cathode arranged in parallel and facing each other, and a direct current stabilizing power source as essential components. The anode is stainless steel, aluminum, Any conductive substrate such as silver, iron, platinum, or carbon may be used, and the cathode may be any metal, but nickel, platinum, palladium, etc. are preferable because hydrogen is generated.

The metal used as the anode and the cathode is preferably net-like, but may be plate-like. If the mesh is 0.5-0.5
2mm is preferable. The gap between the electrodes is preferably 5 to 100 mm. If it is too close, there is a risk of short circuit, and if it is wide, a high voltage power supply is required. It is also possible to install a filter between the anode and the cathode.

In theory, the electrophoresis can be carried out either horizontally or vertically with the anode and cathode arranged, but fine particles such as hydrophobic carbon black or hydrophilic carbon black are dispersed. When using a dispersion liquid, since these fine particles tend to settle due to gravity,
It is preferable to arrange the anode and the cathode horizontally, and to arrange the anode so that the direction in which the fluororesin fine particles and the like move by electrophoresis is the same as the settling direction due to gravity, and the anode is below. By arranging it, it is possible to shorten the traveling time and not only is it efficient,
The anode can be uniformly electrodeposited, and the composition can be made equal.

In electrophoresis, it is not necessary to fix the anode, but if it is moved continuously, the porous membrane attached to the anode can be continuously manufactured. In particular, a wire mesh, which is a base material of a porous membrane, is used as an anode, and by continuously moving it, a solid polymer electrolyte membrane, a reaction layer, a gas supply layer, etc. supported by the base material are continuously produced. be able to.

The voltage used for electrophoresis is 5 to 100 V
/ Cm, the migration amount is proportional to the voltage, and therefore the electrodeposition rate can be controlled by varying the voltage.

The electric conductivity of the solution or dispersion used for electrophoresis is preferably 1 mS or less. However, a material having a high electric conductivity requires a correspondingly high voltage, so that the ions in the solution or dispersion are required. With an ion exchange resin,
The electroconductivity of the electrophoretic solution is preferably 0.05 mS or less, and the pH of the electrophoretic solution also affects the electroconductivity, so it is preferable to adjust it to an appropriate value.

In the present invention, of the solid polymer electrolyte membrane which constitutes the solid polymer electrolyte fuel cell, and the reaction layer and the gas supply layer which constitute the gas diffusion electrode , the reaction layer is an electric layer on the solid polymer electrolyte membrane. By electrophoresis and / or gas supply
The feed layer is characterized in that it is formed by electrophoresis. It is preferable that all are formed by electrophoresis, but a part is existing and the rest is formed by electrophoresis. Anything is fine. The outline of those manufacturing methods will be described below.

1) A stainless steel foil or the like is used as an anode, and a gas supply layer (electrophoresis of a dispersion liquid containing fluororesin fine particles in which hydrophobic carbon black fine particles are dispersed) and a reaction layer (hydrophobic carbon black, hydrophilic) are sequentially formed on the foil. Carbon black,
Electrophoresis with a dispersion or solution of a fluororesin in which a catalyst, metal fine particles or metal oxide fine particles are dispersed), and
A solid polymer electrolyte membrane (electrophoresis with a solution) is formed by electrodeposition by electrophoresis, and two stainless foils obtained by laminating the gas supply layer, the reaction layer, and the solid polymer electrolyte membrane are dried, After joining the laminated body by heating and pressure contact with the inside,
The outer stainless foil is peeled off and used. 2) In the same manner as in 1) above, a reaction layer and a solid polymer electrolyte membrane obtained by electrodeposition by electrophoretic deposition of a reaction layer and a solid polymer electrolyte membrane on a stainless steel foil, and a water repellent layer. The carbon paper or the like is used as the gas supply layer. 3) In the same manner as in 1) above, two stainless steel foils in which a reaction layer and a gas supply layer were sequentially electrodeposited by electrophoretic deposition on a stainless steel foil, and the reaction layer and the gas supply layer were laminated ,
At the time of dry-drying, the solid polymer electrolyte membrane is sandwiched and heat-pressed to bond them, and then the outer stainless steel foil is peeled off. At that time, in the preparation of the reaction layer by electrophoresis, it is preferable to use a solution of the solid polymer electrolyte together with the electrophoresis solution,
Thereby, the adhesion between the reaction layer and the solid polymer electrolyte membrane can be improved. 4) In the electrophoresis tank, a solid polymer electrolyte membrane is provided between an anode and a cathode, and particles moving by electrophoresis are attached to the solid polymer electrolyte membrane, and a reaction layer and a gas supply layer are formed on the membrane. To form. 5) In the same manner as in 1) above, a reaction layer on the stainless steel foil,
Use of a reaction layer / solid polymer electrolyte membrane / reaction layer laminate obtained by electrodeposition of a solid polymer electrolyte membrane and a reaction layer in sequence by electrophoresis, and carbon paper that is water repellent as a gas supply layer . 6) In the same manner as in 1) above, the gas supply layer, the reaction layer, the solid polymer electrolyte membrane, the reaction layer, and the gas supply layer were sequentially electrodeposited by electrophoresis on the stainless steel foil, and the gas supply layer / reaction was performed. Used as a laminated body of layer / solid polymer electrolyte membrane / reaction layer / gas supply layer.

The solid polymer electrolyte fuel cell of the present invention is prepared by the above method, but the preparation method is not limited to the above method, and the reaction layer formed by electrophoresis and the reaction layer And / or drying the gas supply layer,
It can be used as a reaction layer and / or a gas supply layer sheet by adding solvent naphtha or the like and rolling it into a sheet.

Further, the formed reaction layer and gas supply layer are
It is also possible to more efficiently perform drying and bonding by using a porous body for a press plate or the like when heating and pressing at the time of dry-drying.

Further, in order to impart long-term stability to the solid polymer electrolyte fuel cell, a water repellent layer of fluororesin is formed on the entire surface of the gas supply layer in the form of dots having a diameter of about 1 mm or partially. It can also be provided in a strip shape.

[0032]

[Action] solid polymer electrolyte fuel cell and its of the invention
The method of producing a solid polymer electrolyte (fluorine-based ion exchange resin: characterized in that it is formed by electrophoresis in an electrophoretic solution consisting of a solution and / or a dispersion).
In the case of an electrophoretic solution obtained by dissolving a DuPont Nafion solution, etc.) in alcohol at high temperature, the zeta potential is negative in the electrophoretic solution, and when an electric field is applied, it electrophoreses on the anode side and is electro-deposited. Even in the case of a dispersion liquid containing fluororesin particles in the running solution, since the fluororesin particles are dispersed in water and normally carry negative ions, they are easily dispersed by attaching to one electrode by electrophoresis. It can be separated from the medium. Carbon black, which does not show zeta potential in ethanol and does not cause electrophoresis, is also considered to be dispersed together with the solid polymer electrolyte and fluororesin fine particles, and the particles can be attached to the anode by electrophoresis. It is possible.

Therefore, in the solution and / or dispersion,
A conductive substance was immersed in an electrophoretic solution in which hydrophobic carbon black, hydrophilic carbon black, a catalyst, metal fine particles or metal oxide fine particles were dispersed to form one electrode, which was then immersed in the electrophoretic solution. Applying an electric current between the other electrode and forming a solid polymer electrolyte membrane, a fluororesin-containing film, and a fluororesin-containing film containing the various additives on the surface of the conductive substance body by electrophoresis. It is possible to use them as the gas supply layer of the gas diffusion electrode or the base material of the reaction layer, and thus to manufacture the solid polymer electrolyte fuel cell.

[0034]

EXAMPLES The solid polymer electrolyte fuel cell of the present invention and the method for producing the same will be described in more detail with reference to the preferred examples. Reference Example 1 <Preparation of Solid Polymer Electrolyte Membrane> A 6 cm square stainless foil with an insulating lead wire is laid on the bottom of a 6 cm square, 2 cm deep acrylic container, and the upper part 1
2mm in thickness and 50p in diameter, which is a counter electrode parallel to the position of cm
A pi foamed nickel cathode was installed. Solid polymer electrolyte solution (Aldrich, Nafion 5 wt% solution)
Fill until the nickel foam cathode placed in the container is immersed,
When a voltage of 50V is applied for 30 seconds, 6 is applied on the stainless steel foil.
A 0 micron solid polymer electrolyte (Nafion) membrane was formed.

Example 1 <Preparation of Solid Polymer Electrolyte Fuel Cell> A 6 cm square stainless foil with an insulating lead wire is laid on the bottom of an acrylic container 6 cm square and 2 cm deep, and the upper part 1
2mm in thickness and 50p in diameter, which is a counter electrode parallel to the position of cm
A pi foamed nickel cathode was installed. 30 in this container
wt% platinum-supported hydrophilic carbon black (AB-12;
2.5 g of Denki Kagaku Kogyo Co., Ltd., 1 g of low molecular weight PTFE [LUBRON; manufactured by Daikin Industries, Ltd.] and 10 g of ethanol.
A dispersion liquid obtained by ultrasonically dispersing in addition to 0 ml and a solution of a solid polymer electrolyte (manufactured by Aldrich, Nafion 5 wt%
The solution) was mixed with 25 ml of the electrophoretic solution for forming a reaction layer. A voltage of 30 V is applied for 15 seconds to form a reaction layer on the stainless steel foil, the electrophoretic solution is quickly removed, and a solution of solid polymer electrolyte (Nafion 5 wt% solution, manufactured by Aldrich Co.) is foamed in the container. When the cathode was filled until it was immersed and a voltage of 30 V was applied for 30 seconds, a 40-micron solid polymer electrolyte (Nafion) membrane was formed on the stainless steel foil. This reaction layer and the solid polymer electrolyte (Nafion) membrane are electrodeposited on the stainless steel foil 2
When 100 sheets are formed and dried, 100 kg / cm ² , temperature 1
After heating and pressing the two sheets under the condition of 35 ° C. for 1 minute, the stainless foil was peeled off to prepare a reaction layer / electrolyte membrane assembly. As a gas diffusion layer, water-repellent carbon paper cut into 5 cm squares is arranged on both sides, and sandwiched by metal end plates having a gas supply path formed therein, and a solid polymer electrolyte fuel cell according to the present invention is obtained. It was made.

Comparative Example 1 <Preparation of Solid Polymer Electrolyte Fuel Cell> A solid polymer electrolyte (Dafon Nafion 115) membrane was coated with a dispersion for forming a reaction layer and dried to form a reaction layer / electrolyte membrane assembly. Was produced. The platinum catalyst content of this reaction layer was 0.3 mg / cm ² . Similarly, carbon paper having water repellency cut into 5 cm square was placed on both sides as a gas diffusion layer, 100 kg / cm ² , temperature 135 ° C.,
The joined body obtained by heating and pressing under the condition of 2 minutes was sandwiched between metal end plates in which a gas supply path was formed, to produce a solid polymer electrolyte fuel cell.

<Evaluation of Solid Polymer Electrolyte Fuel Cell> Each of the produced solid polymer electrolyte fuel cells was operated under the following conditions, and the current-voltage characteristics of each were measured. Pure hydrogen and pure oxygen were each humidified by a humidifier (glass bubbler) set to a temperature of 83 ° C. and then supplied to the battery at atmospheric pressure. As a result, in the fuel cell of the present invention, 0.73 V was obtained at a current density of 0.3 A / cm ^2.
Output was obtained. On the other hand, in the fuel cell of the comparative example, 0.
Only an output of 0.67 V was obtained at a current density of 3 A / cm ² .

Example 2 <Preparation of Solid Polymer Electrolyte Fuel Cell> A 10 cm square, 1.5 cm thick acrylic plate 2, 3 shown in FIG. 1 was dug into a 6 cm square, 5 mm deep depression to form the bottom of the depression. 6 cm square platinum meshes 4 and 5 with insulating lead wires were provided on the. A solid polymer electrolyte membrane (Nafion 115 manufactured by DuPont) swollen with ethanol was sandwiched, and four corners were fixed with screws to prevent the electrodeposition liquid 7 from leaking to obtain an acrylic cell 1. Solid polymer electrolyte solution (Aldrich,
Nafion 5 wt% solution) 80 ml, ethanol 200
ml, 30 wt% platinum-supported hydrophilic carbon black (A
B-12; manufactured by Denki Kagaku Kogyo Co., Ltd.) 3.6 g, low molecular weight P
2.7 g of TFE (Lubron; manufactured by Daikin Industries, Ltd.) was added and ultrasonically dispersed to prepare an electrodeposition liquid. Acrylic cell 1 was filled with this electrodeposition solution, a voltage of 20 V was applied for 30 seconds, and a reaction layer was formed on one side of the solid polymer electrolyte membrane (cathode chamber side).
Formed. While the formed reaction layer was in a dry state, the solid polymer electrolyte membrane and the reaction layer were firmly bonded by heating and pressure contact under the conditions of 100 kg / cm ² , temperature 135 ° C., and 1 minute. The thickness of the reaction layer is approximately 0.1 mm
Met. The solid polymer electrolyte membrane having the reaction layers firmly bonded is prepared by electrodepositing the acrylic cell 1 with the reaction layer-adhering side as the anode chamber side in the same manner as described above, and electrodepositing the solid polymer electrolyte membrane on both sides to form a solid polymer electrolyte membrane. A molecular electrolyte membrane was obtained. Again, in a freshly dried state, the solid polymer electrolyte membrane and the reaction layer were firmly bonded by heating and pressing under the conditions of 100 kg / cm ² and a temperature of 135 ° C. for 1 minute. According to the present invention, the obtained solid polymer electrolyte membrane having a reaction layer formed on both sides is sandwiched by water-repellent carbon paper and a metal end plate having a gas supply path. A solid polymer electrolyte fuel cell was produced. The amount of platinum supported at this time was 0.4 to 0.6 mg / cm ² . When the produced solid polymer electrolyte fuel cell was operated at a temperature of 80 ° C. in the same manner as above, the cell voltage was 0.72 V at a current density of 0.3 A / cm ² .

[0039]

Since the solid polymer electrolyte fuel cell of the present invention uses electrophoresis, a thin ion exchange membrane can be easily manufactured, and a reaction layer in which polymer electrolyte molecules are dispersed around a catalyst-supporting carbon black is also easy. Since the reaction layer and the solid polymer electrolyte layer have continuous proton paths, a battery with good performance can be obtained.

Further, the solid polymer electrolyte fuel <br/> batteries of the present invention, it is possible to obtain by electrophoresis, can manufacturing equipment easily and be made inexpensive cost of equipment costs it can.

Further, because of the electrophoresis, almost no current flows between the two electrodes, so that the power consumption is small and a uniform electric field is formed between the two electrodes. A polymer electrolyte membrane, a reaction layer or a gas supply layer can be formed, and since the fine particles of the gas diffusion electrode material adhere to the electrode surface by the electric force, so-called Coulomb force, the adhesive force is large and the gas supply is efficient. It is possible to form a layer and / or a reaction layer, and further it is possible to form a gas supply layer and / or a reaction layer by continuously adhering fine particles to the metal mesh surface of the current collector. Therefore, it is effective in mass productivity.

[Brief description of drawings]

FIG. 1 is a schematic explanatory diagram of an acrylic cell used in Example 2 of the present invention.

[Explanation of symbols]

1 Acrylic cell 2,3 acrylic plate 4,5 platinum mesh 6 Solid polymer electrolyte membrane 7 electrodeposition liquid

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01M 8/00-8/24 H01M 4/86-4/98

Claims (11)

(57) [Claims] 1. A solid polymer electrolyte membrane, a reaction layer and a gas supply.
In a solid polymer electrolyte fuel cell composed of layers, the reaction layer is electrophoresed on the solid polymer electrolyte membrane.
Solid polymer electrolysis characterized by being formed
Quality fuel cell. 2. The reaction layer formed by the electrophoresis is thermocompression bonded onto a solid polymer electrolyte membrane.
The solid polymer electrolyte type fuel according to claim 1, wherein
Charge battery. 3. The gas supply layer is made of carbon paper.
The solid polymer electrolyte fuel cell according to claim 1. 4. Solid polymer electrolyte membrane, reaction layer and gas supply
In a solid polymer electrolyte fuel cell comprising layers, the gas supply layer is formed by electrophoresis.
A solid polymer electrolyte fuel cell characterized by the following. 5. The gas supply layer is a solid polymer electrolyte membrane surface
The solid polymer electrolyte fuel cell according to claim 4, wherein the solid polymer electrolyte fuel cell is formed by electrophoresis on the reaction layer formed in 1. 6. A solid polymer electrolyte membrane, a reaction layer and a gas supply
In a solid polymer electrolyte fuel cell comprising layers , the reaction layer and the gas supply layer are formed on the solid polymer electrolyte membrane.
Characterized by being formed by electrophoresis
Solid polymer electrolyte fuel cell. 7. The reaction layer and the gas supply layer are formed on both sides of a solid polymer electrolyte membrane by electrophoresis.
The solid high content according to claim 6, characterized in that
Child electrolyte fuel cell. 8. The solid polymer electrolyte membrane is placed on or near an anode in a solid polymer electrolyte solution.
Electrophoresis of solid polymer electrolyte on the porous body
A film-formed product, according to any one of claims 1 to 7.
A solid polymer electrolyte fuel cell according to any one of the above. 9. Both sides of the solid polymer electrolyte membrane are electrophoresed.
Solid high content prepared by forming a reaction layer
Place the bonded body of the secondary electrolyte membrane and reaction layer through carbon paper.
The solid high component characterized by being sandwiched between two metal plates
Method for manufacturing child electrolyte fuel cell. 10. The solid polymer electrolyte membrane is placed on or near an anode in a solid polymer electrolyte solution.
Electrophoresis of solid polymer electrolyte on the porous body
The film according to claim 9, wherein the film is formed.
Method for manufacturing solid polymer electrolyte fuel cell. 11. Solid polymer electrolysis obtained by electrophoresis
Heating and pressing two laminates consisting of a porous membrane and a reaction layer
Of the solid polymer electrolyte membrane and reaction layer prepared by
The combined body is sandwiched between two metal plates via carbon paper
Of a solid polymer electrolyte fuel cell characterized by
Build method.