CN114388813B - Collector - Google Patents

Abstract

The invention discloses a current collector, which relates to the technical field of electrochemical devices, and comprises a first diffusion layer, a second diffusion layer, a third diffusion layer and a surface protection layer which are sequentially stacked from bottom to top, wherein the first diffusion layer and the third diffusion layer are made of porous materials, and the second diffusion layer comprises a plurality of conductive strips which are arranged at intervals so as to form a gas channel between the conductive strips. The current collector is provided with an open gas diffusion channel, which is beneficial to increasing the gas diffusion flux, reducing the diffusion resistance of the gas such as fuel or air in the electric pile and improving the uniformity of the distribution of the gas such as fuel or air on the surface of the electrode. The current collector provided by the invention forms an open gas diffusion channel through the first diffusion layer, the second diffusion layer and the third diffusion layer, and has high gas diffusion flux.

Description

Collector

technical field

The invention relates to the technical field of electrochemical devices, in particular to a collector material.

Background technique

A solid oxide cell (SOC) is an electrochemical device with an oxygen ion or proton conductive oxide as the electrolyte membrane. It can operate in fuel cell mode and convert fuels such as hydrogen and syngas into electricity and heat efficiently and cleanly. It can also operate in electrolysis mode, converting water/carbon dioxide into hydrogen/carbon monoxide, thereby converting excess electricity into chemical energy. The SOC single cell is composed of a dense electrolyte and a porous air electrode (or positive electrode) and a porous fuel electrode (or negative electrode) on both sides. In order to meet the high power requirements in practical applications, it is necessary to combine the single The fuel electrode collector, the air electrode collector, and the connecting body are connected in series through the fuel electrode seal and the air electrode seal, and packaged to form a stack.

In order to enhance the uniformity of the distribution of fuel, air and other gases on the surface of the electrode, the current collector needs to be machined or etched to create diffusion channels for fuel gas and air on both sides of the connector. In order to enhance the stability of the stack performance, it is also necessary to cover the surface of the connecting body with a protective conductive coating, for example, covering the fuel side of the connecting body with a metal nickel coating, and covering the air side of the connecting body with (La, Sr) MnO ₃ or Conductive oxide coatings such as MnCo ₂ O ₄ . However, the gas diffusion flux of the current collector is low.

Contents of the invention

The main purpose of the present invention is to propose a current collector, aiming at providing a current collector with high gas diffusion flux.

In order to achieve the above object, the present invention proposes a current collector, comprising a first diffusion layer, a second diffusion layer, a third diffusion layer and a surface protection layer stacked sequentially from bottom to top, wherein the first diffusion layer and the The third diffusion layer is made of porous material, and the second diffusion layer includes a plurality of conductive wattles arranged at intervals to form gas channels between the conductive wattles.

Optionally, the material of the first diffusion layer includes Ni, Fe, Co, Cu, FeNi ₃ , 430 stainless steel, Sr ₂ Fe _1.5 Mo _0.5 O _6-δ , La _0.5 Sr _1.5 Fe _1.5 M _0.5 O _6-δ , at least one of LaSrFe _1.5 M _0.5 O _6-δ and La _0.4 Sr _1.6 Fe _1.5 Ni _0.1 M _0.4 O _6-δ , 0≤δ≤1; and/or,

The materials of the conductive vitex include Ni, Fe, Co, Cu, FeNi ₃ , 430 stainless steel, Sr ₂ Fe _1.5 Mo _0.5 O _6-δ , La _0.5 Sr _1.5 Fe _1.5 M _0.5 O _6-δ , LaSrFe _1.5 M _0.5 O At least one of _6-δ and La _0.4 Sr _1.6 Fe _1.5 Ni _0.1 M _0.4 O _6-δ , 0≤δ≤1; and/or,

The material of the third diffusion layer includes Ni, Fe, Co, Cu, FeNi ₃ , 430 stainless steel, Sr ₂ Fe _1.5 Mo _0.5 O _6-δ , La _0.5 Sr _1.5 Fe _1.5 M _0.5 O _6-δ , LaSrFe _1.5 M At least one of _0.5 O _6-δ and La _0.4 Sr _1.6 Fe _1.5 Ni _0.1 M _0.4 O _6-δ , 0≤δ≤1; and/or,

The material of the surface protection layer includes Ni, Fe, Co, Cu, FeNi ₃ , 430 stainless steel, Sr ₂ Fe _1.5 Mo _0.5 O _6-δ , La _0.5 Sr _1.5 Fe _1.5 M _0.5 O _6-δ , LaSrFe _1.5 M _0.5 At least one of O _6-δ and La _0.4 Sr _1.6 Fe _1.5 Ni _0.1 M _0.4 O _6-δ , 0≤δ≤1.

Optionally, the material of the first diffusion layer includes (La _1-x Sr _x )MnO _3-δ , (La _1-x Sr _x )CoO _3-δ , LaBa _0.5 Sr _0.5 Co ₂ O _5+δ , SmBa _0.5 Sr _0.5 Co ₂ O _5+δ , SmBaCo ₂ O _5+δ , BaGd _0.8 La _0.2 Co ₂ O _6-δ , Sr ₂ Fe _1.5 Mo _0.5 O _6-δ , La _0.5 Sr _1.5 Fe _1.5 M _0.5 O _{6 -δ} , at least one of LaSrFe _1.5 M _0.5 O _6-δ and La _0.4 Sr _1.6 Fe _1.5 Ni _0.1 M _0.4 O _6-δ , 0≤δ≤1, 0≤x≤1; and/or,

The materials of the conductive vitex include (La _1-x Sr _x )MnO _3-δ , (La _1-x Sr _x )CoO _3-δ , LaBa _0.5 Sr _0.5 Co ₂ O _5+δ , SmBa _0.5 Sr _0.5 Co ₂ O _5+δ , SmBaCo ₂ O _5+δ , BaGd _0.8 La _0.2 Co ₂ O _6-δ , Sr ₂ Fe _1.5 Mo _0.5 O _6-δ , La _0.5 Sr _1.5 Fe _1.5 M _0.5 O _6-δ , LaSrFe _1.5 M At least one of _0.5 O _6-δ and La _0.4 Sr _1.6 Fe _1.5 Ni _0.1 M _0.4 O _6-δ , 0≤δ≤1, 0≤x≤1; and/or,

The material of the third diffusion layer includes (La _1-x Sr _x )MnO _3-δ , (La _1-x Sr _x )CoO _3-δ , LaBa _0.5 Sr _0.5 Co ₂ O _5+δ , SmBa _0.5 Sr _0.5 Co ₂ O _5+δ , SmBaCo ₂ O _5+δ , BaGd _0.8 La _0.2 Co ₂ O _6-δ , Sr ₂ Fe _1.5 Mo _0.5 O _6-δ , La _0.5 Sr _1.5 Fe _1.5 M _0.5 O _6-δ , LaSrFe At least one of _1.5 M _0.5 O _6-δ and La _0.4 Sr _1.6 Fe _1.5 Ni _0.1 M _0.4 O _6-δ , 0≤δ≤1, 0≤x≤1; and/or,

The material of the surface protection layer includes (La _1-x Sr _x )MnO _3-δ , (La _1-x Sr _x )CoO _3-δ , LaBa _0.5 Sr _0.5 Co ₂ O _5+δ , SmBa _0.5 Sr _0.5 Co ₂ O _5+δ , SmBaCo ₂ O _5+δ , BaGd _0.8 La _0.2 Co ₂ O _6-δ , Sr ₂ Fe _1.5 Mo _0.5 O _6-δ , La _0.5 Sr _1.5 Fe _1.5 M _0.5 O _6-δ , LaSrFe _1.5 At least one of M _0.5 O _6-δ and La _0.4 Sr _1.6 Fe _1.5 Ni _0.1 M _0.4 O _6-δ , 0≤δ≤1, 0≤x≤1.

Optionally, the porosity of the first diffusion layer is 30%-98%; and/or,

The porosity of the third diffusion layer is 30%-98%; and/or,

The thickness of the first diffusion layer is 0.05-1 mm; and/or,

The thickness of the third diffusion layer is 0.05-1 mm; and/or,

The thickness of the second diffusion layer is 0.05-1 mm.

Optionally, the conductive vitex is a cylinder, and the diameter of the cylinder is 0.5-10 mm.

Optionally, the material of the conductive vitex is porous, and the porosity of the porous material is 0%-90%.

Optionally, the thickness of the surface protection layer is 1-1000 μm; and/or,

The material of the surface protection layer is a porous material, and the porosity of the porous material is 0%-40%.

Optionally, there are multiple second diffusion layers and third diffusion layers, and the numbers of the second diffusion layers and the third diffusion layers are equal.

Optionally, the thickness of the current collector is 0.1-5 mm; and/or,

The first diffusion layer, the conductive wattle and the third diffusion layer are all provided with straight holes extending vertically, and the diameter of the straight holes is 5-200 μm.

In the technical solution provided by the present invention, a current collector is proposed, including a first diffusion layer, a second diffusion layer, a third diffusion layer and a surface protection layer stacked sequentially from bottom to top, wherein the first diffusion layer and The third diffusion layer is made of a porous material, and the second diffusion layer includes a plurality of conductive wattles arranged at intervals to form gas channels between the conductive wattles, so that the current collector has an open gas diffusion channel. It helps to increase the gas diffusion flux, reduce the diffusion resistance of fuel or air and other gases in the stack, and improve the uniformity of fuel or air and other gases on the electrode surface. The current collector proposed by the present invention forms an open gas diffusion channel through the first diffusion layer, the second diffusion layer and the third diffusion layer, and has high gas diffusion flux.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only For some embodiments of the present invention, those skilled in the art can also obtain other related drawings according to these drawings without any creative effort.

Fig. 1 is an exploded schematic diagram of an embodiment of a current collector provided by the present invention;

FIG. 2 is a schematic structural view of an embodiment of a current collector proposed by the present invention.

Explanation of reference numbers:

label name label name 100 Collector 3 third diffusion layer 200 repeat unit 4 surface protection layer 1 first diffusion layer 5 Conductive Vitex 2 second diffusion layer

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Those who do not indicate the specific conditions in the examples are carried out according to the conventional conditions or the conditions suggested by the manufacturer. The reagents or instruments used were not indicated by the manufacturer, and they were all conventional products that could be purchased from the market.

In addition, the meaning of "and/or" appearing in the whole text includes three parallel schemes, taking "A and/or B" as an example, including scheme A, scheme B, or schemes that both A and B satisfy. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

In order to enhance the uniformity of the distribution of fuel, air and other gases on the surface of the electrode, the current collector needs to be machined or etched to create diffusion channels for fuel gas and air on both sides of the connector. In order to enhance the stability of the stack performance, it is also necessary to cover the surface of the connecting body with a protective conductive coating, for example, covering the fuel side of the connecting body with a metal nickel coating, and covering the air side of the connecting body with (La, Sr) MnO ₃ or Conductive oxide coatings such as MnCo ₂ O ₄ . However, the gas diffusion flux of the current collector is low.

In view of this, the present invention proposes a current collector, aiming to provide a current collector with high gas diffusion flux. In the accompanying drawings of this invention, FIG. 1 is an exploded schematic diagram of an embodiment of a current collector provided by the present invention; FIG. 2 is a schematic structural diagram of an embodiment of a current collector proposed by the present invention.

Referring to Fig. 1 and Fig. 2, the present invention proposes a current collector 100, which includes a first diffusion layer 1, a second diffusion layer 2, a third diffusion layer 3 and a surface protection layer 4 stacked in sequence from bottom to top, wherein, The material of the first diffusion layer 1 and the third diffusion layer 3 is a porous material, and the second diffusion layer 2 includes a plurality of conductive wattles 5 arranged at intervals to form gas passages between the conductive wattles 5 .

In the technical solution provided by the present invention, a current collector 100 is proposed, including a first diffusion layer 1, a second diffusion layer 2, a third diffusion layer 3 and a surface protection layer 4 that are sequentially stacked from bottom to top, wherein the The first diffusion layer 1 and the third diffusion layer 3 are porous materials, and the second diffusion layer 2 includes a plurality of conductive wattles 5 arranged at intervals to form gas channels between the conductive wattles 5 . The current collector 100 has an open gas diffusion channel, which helps to increase the gas diffusion flux, reduce the diffusion resistance of fuel or air and other gases in the stack, and improve the uniformity of the distribution of fuel or air and other gases on the electrode surface. The current collector 100 proposed by the present invention forms an open gas diffusion channel through the first diffusion layer 1 , the second diffusion layer 2 and the third diffusion layer 3 , and has a high gas diffusion flux.

It can be understood that the present invention does not limit the connection method between the first diffusion layer 1 , the second diffusion layer 2 , the third diffusion layer 3 and the surface protection layer 4 , preferably, they are formed by mutual sintering.

In one embodiment of the present invention, preferably, the first diffusion layer 1, the conductive wattle 5, the third diffusion layer 3 and the surface protection layer 4 have high electronic conductivity in a reducing atmosphere rate (>1S/cm) of metals, alloys, oxides, carbides and their composites, specifically, the material of the first diffusion layer 1 includes Ni, Fe, Co, Cu, FeNi ₃ , 430 stainless steel, At least one of Sr ₂ Fe _1.5 Mo _0.5 O _6-δ , La _0.5 Sr _1.5 Fe _1.5 M _0.5 O _6-δ , LaSrFe _1.5 M _0.5 O _6-δ and La _0.4 Sr _1.6 Fe _1.5 Ni _0.1 M _0.4 O _6-δ One, 0≤δ≤1; the material of the conductive Vitex 5 includes Ni, Fe, Co, Cu, FeNi ₃ , 430 stainless steel, Sr ₂ Fe _1.5 Mo _0.5 O _6-δ , La _0.5 Sr _1.5 Fe _1.5 M _0.5 At least one of O _6-δ , LaSrFe _1.5 M _0.5 O _6-δ and La _0.4 Sr _1.6 Fe _1.5 Ni _0.1 M _0.4 O _6-δ , 0≤δ≤1; the material of the third diffusion layer 3 includes Ni, Fe, Co, Cu, FeNi ₃ , 430 stainless steel, Sr ₂ Fe _1.5 Mo _0.5 O _6-δ , La _0.5 Sr _1.5 Fe _1.5 M _0.5 O _6-δ , LaSrFe _1.5 M _0.5 O _6-δ and La _0.4 Sr At least one of _1.6 Fe _1.5 Ni _0.1 M _0.4 O _6-δ , 0≤δ≤1; the material of the surface protection layer 4 includes Ni, Fe, Co, Cu, FeNi ₃ , 430 stainless steel, Sr ₂ Fe _{1.5 0 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _} ≤δ≤1. In this way, the current collector 100 has high electronic conductivity, reducing the electron conduction resistance between the porous electrode (fuel electrode or air electrode) and the connecting body.

It can be understood that the selection of the materials of the above-mentioned first diffusion layer 1, conductive wattle 5, third diffusion layer 3 and surface protection layer 4 can be satisfied at the same time, or only one of them can be satisfied, and as a preferred embodiment of the present invention, the above-mentioned At the same time, the electrical conductivity of the current collector 100 is higher.

In another embodiment of the present invention, preferably, the first diffusion layer 1, the conductive wattle 5, the third diffusion layer 3 and the surface protection layer 4 have high electron density in an oxidizing atmosphere. Conductivity (>1S/cm) oxides, carbides and their composites, specifically, the material of the first diffusion layer 1 includes (La _1-x Sr _x )MnO _3-δ , (La _{1- x} Sr _x )CoO _3-δ , LaBa _0.5 Sr _0.5 Co ₂ O _5+δ , SmBa _0.5 Sr _0.5 Co ₂ O _5+δ , SmBaCo ₂ O _5+δ , BaGd _0.8 La _0.2 Co ₂ O _6-δ , Sr At least one of ₂ Fe _1.5 Mo _0.5 O _6-δ , La _0.5 Sr _1.5 Fe _1.5 M _0.5 O _6-δ , LaSrFe _1.5 M _0.5 O _6-δ and La _0.4 Sr _1.6 Fe _1.5 Ni _0.1 M _0.4 O _6-δ 0≤δ≤1, 0≤x≤1; the material of the conductive Vitex 5 includes (La _1-x Sr _x )MnO _3-δ , (La _1-x Sr _x )CoO _3-δ , LaBa _0.5 Sr _0.5 Co ₂ O _5+δ , SmBa _0.5 Sr _0.5 Co ₂ O _5+δ , SmBaCo ₂ O _5+δ , BaGd _0.8 La _0.2 Co ₂ O _6-δ , Sr ₂ Fe _1.5 Mo _0.5 O _6-δ , La At least one of _0.5 Sr _1.5 Fe _1.5 M _0.5 O _6-δ , LaSrFe _1.5 M _0.5 O _6-δ and La _0.4 Sr _1.6 Fe _1.5 Ni _0.1 M _0.4 O _6-δ , 0≤δ≤1, 0≤x ≤1; the material of the third diffusion layer 3 includes (La _1-x Sr _x )MnO _3-δ , (La _1-x Sr _x )CoO _3-δ , LaBa _0.5 Sr _0.5 Co ₂ O _5+δ , SmBa _0.5 Sr _0.5 Co ₂ O _5+δ , SmBaCo ₂ O _5+δ , BaGd _0.8 La _0.2 Co ₂ O _6-δ , Sr ₂ Fe _1.5 Mo _0.5 O _6-δ , La _0.5 Sr _1.5 Fe _1.5 M _0.5 O _{6 -δ} , at least one of LaSrFe _1.5 M _0.5 O _6-δ and La _0.4 Sr _1.6 Fe _1.5 Ni _0.1 M _0.4 O _6-δ , 0≤δ≤1, 0≤x≤1; the surface protection layer 4 The materials include (La _1-x Sr _x )MnO _3-δ , (La _1-x Sr _x )CoO _3-δ , LaBa _0.5 Sr _0.5 Co ₂ O _5+δ , SmBa _0.5 Sr _0.5 Co ₂ O _5+δ , SmBaCo ₂ O _5+δ , BaGd _0.8 La _0.2 Co ₂ O _6-δ , Sr ₂ Fe _1.5 Mo _0.5 O _6-δ , La _0.5 Sr _1.5 Fe _1.5 M _0.5 O 6 _-δ , LaSrFe _1.5 M _0.5 O ₆ -δ At least one of _δ and La _0.4 Sr _1.6 Fe _1.5 Ni _0.1 M _0.4 O _6-δ , 0≤δ≤1, 0≤x≤1. In this way, the current collector 100 has high electronic conductivity, reducing the electron conduction resistance between the porous electrode (fuel electrode or air electrode) and the connecting body.

In the same way, the selection of the materials of the first diffusion layer 1, the conductive wattle 5, the third diffusion layer 3 and the surface protection layer 4 can be satisfied at the same time, or only one of them can be satisfied, and as a preferred embodiment of the present invention, the above-mentioned At the same time, the electrical conductivity of the current collector 100 is higher.

In the solid oxide battery stack, the surface protection layer 4 is in close contact with the airtight connecting body, and the atoms in the connecting body volatilize and deposit inside the porous electrode to inhibit the resulting electrode passivation and stacking. Performance decay, therefore, the surface protection layer 4 is preferably a porous material with a low porosity of 0-40% (preferably in the range of 0-10%), or even completely dense.

In order to promote the rapid diffusion of gas such as fuel or air in the current collector 100 to enhance the uniformity of gas distribution on the surface of the porous electrode, the first diffusion layer 1 and the third diffusion layer 3 have 30% to 98% (preferably in the range of 50% to 70%) porosity. The area of the second diffusion layer 2 except the conductive vitex 5 constitutes an open channel connected to each other, and the gas can be quickly transported in the open channel. In addition, the conductive vitex 5 can be dense, and of course it can be It is a porous material with a porosity of 0-90% (preferred range 30%-60%). The first diffusion layer 1 is in close contact with the porous electrode (fuel electrode or air electrode) of the single cell, so that gas can also pass through The pores of the conductive Vitex 5 are diffused for fast transmission.

Further, the conductive vitex 5 is a cylinder, and the diameter of the cylinder is 0.5-10 mm, more preferably 1-2 mm. In the embodiment of the present invention, please refer to Fig. 1 and Fig. 2 , the cylinder is along the vertical direction Extended, the two bottom surfaces are distributed up and down, so that the gas is quickly transported in the open channel.

Furthermore, the first diffusion layer 1, the conductive wattle 5 and the third diffusion layer 3 are all provided with straight holes extending vertically, and the diameter of the straight holes is 5-200 μm (preferably Range 50 ~ 150μm). In addition, preferably, the straight holes of the first diffusion layer 1, the conductive wattles 5, and the third diffusion layer 3 correspond to each other to form airflow channels, so that the current collector 100 has a lower porosity and even a dense protective The conductive coating prevents the volatilization and deposition of atoms in the connector to the interior of the porous electrode, thereby avoiding the resulting electrode passivation and stack performance degradation.

The present invention does not limit the thickness of each layer. Preferably, the thickness of the first diffusion layer 1 is 0.05-1 mm (more preferably 0.2-0.5 mm); the thickness of the second diffusion layer 2 is 0.05-1 mm. (more preferably 0.2-0.5 mm); the thickness of the third diffusion layer 3 is 0.05-1 mm (more preferably 0.2-0.5 mm); the thickness of the surface protection layer 4 is 1-1000 μm (more preferably 10 ~100 μm); under the above thickness, the gas diffusion flux of the current collector 100 is high.

It can be understood that the thicknesses of the first diffusion layer 1, the second diffusion layer 2, the third diffusion layer 3 and the surface protection layer 4 refer to the dimensions of each layer in the upper and lower directions, and the above four thickness ranges can be satisfied at the same time, or can be Only one of them is satisfied, and as a preferred embodiment of the present invention, the above four thickness ranges are satisfied at the same time, so that the gas diffusion flux of the current collector 100 is higher.

Further, in the embodiment of the present invention, the thickness of the current collector 100 is 0.1-5 mm, under the above thickness, the gas diffusion flux of the current collector 100 is high.

Preferably, a plurality of the second diffusion layer 2 and the third diffusion layer 3 are provided, and the number of the second diffusion layer 2 and the third diffusion layer 3 are equal, so that one second The diffusion layer 2 and a third diffusion layer 3 constitute a repeating unit 200, and the current collector 100 is provided with one or more repeating units 200 between the first diffusion layer 1 and the surface protection layer 4, so that the gas diffusion flux of the current collector 100 high.

In summary, the current collector 100 proposed in the embodiment of the present invention, firstly, the current collector 100 has high electronic conductivity, which reduces the electronic conduction resistance between the porous electrode (fuel electrode or air electrode) and the connecting body; secondly, the The current collector 100 has an open gas diffusion channel, which helps to increase the gas diffusion flux, reduce the diffusion resistance of fuel or air and other gases in the stack, and improve the uniformity of fuel or air and other gases on the electrode surface; finally The current collector 100 also has a relatively low porosity or even a dense protective conductive coating, which prevents the volatilization and deposition of atoms in the connector to the interior of the porous electrode, thereby avoiding the resulting electrode passivation and stack performance degradation.

The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the patent protection scope of the present invention.

Claims (9)

1. The utility model provides a current collector, its characterized in that includes from down upwards stacks first diffusion layer, second diffusion layer, third diffusion layer and the surface protection layer that sets up in proper order, wherein, first diffusion layer with the material of third diffusion layer is porous material, the second diffusion layer includes a plurality of conductive wattle that the interval set up, in order to form the gas channel between the conductive wattle.

2. The current collector of claim 1, wherein the material of the first diffusion layer comprises Ni, fe, co, cu, feNi ₃ Stainless steel, sr 430 ₂ Fe _1.5 Mo _0.5 O _6-δ 、La _0.5 Sr _1.5 Fe _1.5 M _0.5 O _6-δ 、LaSrFe _1.5 M _0.5 O _6-δ And La (La) _0.4 Sr _1.6 Fe _1.5 Ni _0.1 M _0.4 O _6-δ At least one of which delta is more than or equal to 0 and less than or equal to 1; and/or the number of the groups of groups,

the conductive strips comprise Ni, fe, co, cu, feNi ₃ Stainless steel, sr 430 ₂ Fe _1.5 Mo _0.5 O _6-δ 、La _0.5 Sr _1.5 Fe _1.5 M _0.5 O _6-δ 、LaSrFe _1.5 M _0.5 O _6-δ And La (La) _0.4 Sr _1.6 Fe _1.5 Ni _0.1 M _0.4 O _6-δ At least one of which delta is more than or equal to 0 and less than or equal to 1; and/or the number of the groups of groups,

the material of the third diffusion layer comprises Ni, fe, co, cu, feNi ₃ Stainless steel, sr 430 ₂ Fe _1.5 Mo _0.5 O _6-δ 、La _0.5 Sr _1.5 Fe _1.5 M _0.5 O _6-δ 、LaSrFe _1.5 M _0.5 O _6-δ And La (La) _0.4 Sr _1.6 Fe _1.5 Ni _0.1 M _0.4 O _6-δ At least one of which is more than or equal to 0 and less than or equal to delta1, a step of; and/or the number of the groups of groups,

the material of the surface protection layer comprises Ni, fe, co, cu, feNi ₃ Stainless steel, sr 430 ₂ Fe _1.5 Mo _0.5 O _6-δ 、La _0.5 Sr _1.5 Fe _1.5 M _0.5 O _6-δ 、LaSrFe _1.5 M _0.5 O _6-δ And La (La) _0.4 Sr _1.6 Fe _1.5 Ni _0.1 M _0.4 O _6-δ At least one of which is more than or equal to 0 and less than or equal to 1.

3. The current collector according to claim 1, wherein the material of the first diffusion layer comprises (La _1-x Sr _x )MnO _3-δ 、(La _1-x Sr _x )CoO _3-δ 、LaBa _0.5 Sr _0.5 Co ₂ O _5+δ 、SmBa _0.5 Sr _0.5 Co ₂ O _5+δ 、SmBaCo ₂ O _5+δ 、BaGd _0.8 La _0.2 Co ₂ O _6-δ 、Sr ₂ Fe _1.5 Mo _0.5 O _6-δ 、La _0.5 Sr _1.5 Fe _1.5 M _0.5 O _6-δ 、LaSrFe _1.5 M _0.5 O _6-δ And La (La) _0.4 Sr _1.6 Fe _1.5 Ni _0.1 M _0.4 O _6-δ At least one of the components is more than or equal to 0 and less than or equal to 1, and more than or equal to 0 and less than or equal to 1; and/or the number of the groups of groups,

the conductive thorn comprises (La) _1-x Sr _x )MnO _3-δ 、(La _1-x Sr _x )CoO _3-δ 、LaBa _0.5 Sr _0.5 Co ₂ O _5+δ 、SmBa _0.5 Sr _0.5 Co ₂ O _5+δ 、SmBaCo ₂ O _5+δ 、BaGd _0.8 La _0.2 Co ₂ O _6-δ 、Sr ₂ Fe _1.5 Mo _0.5 O _6-δ 、La _0.5 Sr _1.5 Fe _1.5 M _0.5 O _6-δ 、LaSrFe _1.5 M _0.5 O _6-δ And La (La) _0.4 Sr _1.6 Fe _1.5 Ni _0.1 M _0.4 O _6-δ At least one of the components is more than or equal to 0 and less than or equal to 1, and more than or equal to 0 and less than or equal to 1; and/or the number of the groups of groups,

the material of the third diffusion layer comprises (La _1-x Sr _x )MnO _3-δ 、(La _1-x Sr _x )CoO _3-δ 、LaBa _0.5 Sr _0.5 Co ₂ O _5+δ 、SmBa _0.5 Sr _0.5 Co ₂ O _5+δ 、SmBaCo ₂ O _5+δ 、BaGd _0.8 La _0.2 Co ₂ O _6-δ 、Sr ₂ Fe _1.5 Mo _0.5 O _6-δ 、La _0.5 Sr _1.5 Fe _1.5 M _0.5 O _6-δ 、LaSrFe _1.5 M _0.5 O _6-δ And La (La) _0.4 Sr _1.6 Fe _1.5 Ni _0.1 M _0.4 O _6-δ At least one of the components is more than or equal to 0 and less than or equal to 1, and more than or equal to 0 and less than or equal to 1; and/or the number of the groups of groups,

the material of the surface protection layer comprises (La _1-x Sr _x )MnO _3-δ 、(La _1-x Sr _x )CoO _3-δ 、LaBa _0.5 Sr _0.5 Co ₂ O _5+δ 、SmBa _0.5 Sr _0.5 Co ₂ O _5+δ 、SmBaCo ₂ O _5+δ 、BaGd _0.8 La _0.2 Co ₂ O _6-δ 、Sr ₂ Fe _1.5 Mo _0.5 O _6-δ 、La _0.5 Sr _1.5 Fe _1.5 M _0.5 O _6-δ 、LaSrFe _1.5 M _0.5 O _6-δ And La (La) _0.4 Sr _1.6 Fe _1.5 Ni _0.1 M _0.4 O _6-δ At least one of the components is more than or equal to 0 and less than or equal to 1, and more than or equal to 0 and less than or equal to 1.

4. The current collector of claim 1, wherein the first diffusion layer has a porosity of 30% to 98%; and/or the number of the groups of groups,

the porosity of the third diffusion layer is 30% -98%; and/or the number of the groups of groups,

the thickness of the first diffusion layer is 0.05-1 mm; and/or the number of the groups of groups,

the thickness of the third diffusion layer is 0.05-1 mm; and/or the number of the groups of groups,

the thickness of the second diffusion layer is 0.05-1 mm.

5. The current collector of claim 1, wherein the conductive ribs are cylinders having a diameter of 0.5 to 10mm.

6. The current collector of claim 1, wherein the conductive strips are porous and have a porosity of 0% to 90%.

7. The current collector of claim 1, wherein the surface protective layer has a thickness of 1 to 1000 μm; and/or the number of the groups of groups,

the surface protection layer is made of porous materials, and the porosity of the porous materials is 0% -40%.

8. The current collector of claim 1, wherein the second diffusion layer and the third diffusion layer are each provided in plurality, and the second diffusion layer and the third diffusion layer are provided in equal numbers.

9. A current collector according to claim 1, wherein the thickness of the current collector is 0.1 to 5mm; and/or the number of the groups of groups,

straight holes extending vertically are formed in the first diffusion layer, the conductive strips and the third diffusion layer in a penetrating mode, and the aperture of each straight hole is 5-200 microns.

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