Assembly of membrane, electrode, gas diffusion layer and gasket, method for producing the same, and solid polymer fuel cell

A technology of a gas diffusion layer and a manufacturing method, which is applied to solid electrolyte fuel cells, fuel cells, components of fuel cells, etc., can solve the problems of low strength, high cost, and environmental load of the heat-resistant film, and achieves durability. Excellent effect with excellent power generation characteristics

Inactive Publication Date: 2010-03-31
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, polymer electrolyte membranes (fluorine-based electrolyte membranes) obtained from fluorine-based polymer electrolytes have been pointed out to be burdensome to the environment, very expensive, have low heat resistance and membrane strength, and are not practical without some reinforcement.

Method used

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  • Assembly of membrane, electrode, gas diffusion layer and gasket, method for producing the same, and solid polymer fuel cell
  • Assembly of membrane, electrode, gas diffusion layer and gasket, method for producing the same, and solid polymer fuel cell
  • Assembly of membrane, electrode, gas diffusion layer and gasket, method for producing the same, and solid polymer fuel cell

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Effect test

no. 1 approach

[0043] figure 1 It is a schematic cross-sectional view of a solid polymer fuel cell having a membrane-electrode-gas diffusion layer-gasket assembly according to the first embodiment of the present invention. Such as figure 1 As shown, the membrane-electrode assembly 10 has the cathode catalyst layer 2 on one main surface of the hydrocarbon-based polymer electrolyte membrane 1 and has the anode catalyst layer 3 on the other main surface of the hydrocarbon-based polymer electrolyte membrane 1 . That is, the cathode catalyst layer 2 and the anode catalyst layer 3 are stacked with the hydrocarbon-based polymer electrolyte membrane 1 interposed therebetween to constitute the membrane-electrode assembly 10 .

[0044] On the membrane-electrode assembly 10, the cathode-side gas diffusion layer 4 is provided in contact with the main surface of the cathode catalyst layer 2 opposite to the contact surface of the hydrocarbon-based polymer electrolyte membrane 1, and the anode catalyst la...

no. 2 approach

[0122] Figure 4 It is a schematic cross-sectional view of a solid polymer fuel cell having a membrane-electrode-gas diffusion layer-gasket assembly according to a second embodiment of the present invention. Such as Figure 4 As shown, the membrane-electrode assembly 15 has the cathode catalyst layer 2 on one main surface of the hydrocarbon-based polymer electrolyte membrane 1 and has the anode catalyst layer 3 on the other main surface of the hydrocarbon-based polymer electrolyte membrane 1 . That is, the cathode catalyst layer 2 and the anode catalyst layer 3 are stacked with the hydrocarbon-based polymer electrolyte membrane 1 interposed therebetween to constitute the membrane-electrode assembly 15 .

[0123] On the membrane-electrode assembly 15, the cathode-side gas diffusion layer 4 is provided in contact with the main surface of the cathode catalyst layer 2 opposite to the contact surface of the hydrocarbon-based polymer electrolyte membrane 1, and the cathode-side gas...

no. 3 approach

[0136] Image 6 It is a schematic structural view of a solid polymer fuel cell according to the third embodiment of the present invention. Such as Image 6 As shown, the solid polymer fuel cell 40 has the following structure.

[0137] A cathode catalyst layer 2 is stacked on one main surface of a hydrocarbon-based polymer electrolyte membrane 1 , and an anode catalyst layer 3 is stacked on the other main surface. A cathode-side gas diffusion layer 4 is stacked on the main surface of the cathode catalyst layer 2 opposite to the contact surface with the hydrocarbon-based polymer electrolyte membrane 1 . A cathode-side gasket 6 covering the end surfaces of the cathode catalyst layer 2 and the cathode-side gas diffusion layer 4 is provided around the cathode catalyst layer 2 and the cathode-side gas diffusion layer 4 . The anode-side gas diffusion layer 5 is stacked on the main surface of the anode catalyst layer 3 opposite to the contact surface with the hydrocarbon-based poly...

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Abstract

Disclosed is a method for producing an assembly (30) of membrane, electrode, gas diffusion layer and gasket, which comprises a cathode sealing step wherein a cathode side gasket (6) is formed on the end faces of a cathode side gas diffusion layer (4) and a cathode catalyst layer (2) of a membrane-electrode-gas diffusion layer assembly (20), and an anode sealing step wherein an anode side gasket (7) is formed on the end faces of an anode side gas diffusion layer (5) and an anode catalyst layer (3) of the assembly (20). This method for producing a membrane-electrode-gas diffusion layer-gasket assembly (30) is characterized in that when C1 represents the thickness of the cathode side gasket (6), A1 represents the thickness of the cathode catalyst layer (2) and B1 represents the cathode side gas diffusion layer (4), the relation (1) shown below is satisfied. (A1 + B1) / C1 >= 1.2 (1).

Description

technical field [0001] The present invention relates to a membrane-electrode-gas diffusion layer-gasket assembly, a manufacturing method thereof, and a solid polymer fuel cell having the membrane-electrode-gas diffusion layer-gasket assembly. Background technique [0002] Polymer electrolyte membranes using proton-conductive polymers are used as electrolyte membranes for primary batteries, secondary batteries, solid polymer fuel cells, and the like. As such a polymer electrolyte membrane, a polymer electrolyte membrane of a fluorine-based polymer electrolyte represented by Nafion (registered trademark) has been mainly studied at present. However, polymer electrolyte membranes (fluorine-based electrolyte membranes) obtained from fluorine-based polymer electrolytes have been pointed out to be burdensome to the environment, very expensive, have low heat resistance and membrane strength, and are impractical without some reinforcement. . [0003] Under such circumstances, in re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M4/86H01M4/88H01M8/10
CPCH01M4/886H01M8/0273Y02E60/521H01M4/8605H01M4/881H01M8/242H01M8/1002H01M8/1007Y02P70/50Y02E60/50H01M8/2483H01M4/88H01M8/02H01M8/10
Inventor 栗田宽之斋藤伸黑田龙磨坂井大雅
Owner SUMITOMO CHEM CO LTD
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