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Method for manufacturing electrode for fuel cell

A fuel cell and electrode technology, which can be used in fuel cells, fuel cell components, battery electrodes, etc., to solve problems such as productivity obstacles

Inactive Publication Date: 2005-05-04
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Product parts that are displaced from the surface layer portion 701a of the negative electrode 701 can only be disposed of as waste or need to be repaired, which constitutes an obstacle to improving productivity

Method used

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  • Method for manufacturing electrode for fuel cell
  • Method for manufacturing electrode for fuel cell
  • Method for manufacturing electrode for fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0119] The electrode 12 of Example 1 has the negative electrode layer 19 and the positive electrode layer 20 located inside the negative electrode diffusion layer 13 and the positive electrode diffusion layer 16 respectively, and the ion exchange membrane 21 is located between the negative electrode layer 19 and the positive electrode layer 20 .

[0120] The negative-electrode-side diffusion layer 13 is a sheet composed of the negative-electrode-side carbon paper 14 and the negative-electrode-side adhesive layer 15 .

[0121] The positive-side diffusion layer 16 is a sheet composed of a positive-side carbon paper 17 and a positive-side adhesive layer 18 .

[0122] The binder constituting the negative electrode side binder layer 15 is a fluorocarbon resin, and the binder has excellent hydrophilicity. The binder constituting the positive electrode side binder layer 18 is a carbon polymer having excellent hydrophobicity. A substance obtained by introducing sulfonic acid into the...

Embodiment 3

[0220] In Embodiment 3, the fuel cell electrode 72 has a positive electrode layer 70 (ie, the first electrode layer) and a negative electrode layer 19 (ie, the second electrode layer) inside the positive electrode side diffusion layer 16 and the negative electrode side diffusion layer 13, respectively, and the negative electrode layer There is an ion exchange membrane 21 between layer 19 and positive electrode layer 70 . That is, only the positive electrode layer 70 of the fuel cell electrode 72 in Example 3 is different from the fuel cell electrode 62 in Example 2, and the rest of the structure is the same as in Example 2. The positive electrode layer 70 will be described below.

[0221] The positive electrode layer 70 is divided into the first layer 70a away from the ion exchange membrane 21 side (i.e. in contact with the positive side diffusion layer 16 side); and the second layer 70b in contact with the ion exchange membrane 21 side, when the porosity is by the following ...

Embodiment 4

[0245] In Example 4, the fuel cell electrode 112 has the negative electrode layer 19 and the positive electrode layer 20 inside the negative electrode diffusion layer 113 and the positive electrode diffusion layer 116, respectively, and has the ion exchange membrane 21 between the negative electrode layer 19 and the positive electrode layer 20.

[0246] The positive-electrode-side diffusion layer 116 is a sheet composed of a positive-electrode-side carbon paper 117 that is a first carbon paper and a positive-electrode-side adhesive layer 118 that is a first adhesive layer.

[0247] The anode-side diffusion layer 113 is a sheet composed of the anode-side carbon paper 114 which is the second carbon paper and the anode-side adhesive layer 115 which is the second adhesive layer.

[0248] The solution of the negative electrode side adhesive layer 115 contains, for example, carbon particles 115a and an ion exchange resin serving as an adhesive resin 115b excellent in adhesiveness. T...

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Abstract

The invention provides an electrode for a fuel cell, which comprises a positive electrode layer (20), a negative electrode layer (19) and an ion exchange membrane (21) placed therebetween. Before the solution for preparing one of the positive and negative electrodes is dried, the solution for preparing the ion exchange membrane is coated thereon, and then, the solution for preparing the ion exchange membrane is coated in a state where the solution for preparing the ion exchange membrane is not yet dried. solution for the other electrode. Since the layers are not yet dry, the adhesion between the layers is enhanced. By making the ion exchange membrane into solution, the coated membrane can be made very thin.

Description

technical field [0001] The present invention relates to a preparation method of an electrode for a fuel cell, the fuel cell contains an ion exchange membrane placed between a positive electrode and a negative electrode, and hydrogen is contacted with a catalyst on the negative electrode while oxygen is contacted with a catalyst on the positive electrode to form an electrode. Generate electricity. Background technique [0002] 33 and 34 show conventional fuel cell electrodes. In this fuel cell electrode 700, an ion exchange membrane 703 is interposed between a negative electrode layer (hydrogen electrode) 701 and a positive electrode layer (oxygen electrode) 702, allowing hydrogen molecules (H 2 ) is in contact with the catalyst contained in the negative electrode layer 701, oxygen molecules (O 2 ) is in contact with the catalyst contained in the positive electrode layer 702, so that the electrons e - Flow occurs as indicated by the arrows, thus creating an electric curren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88H01M4/92H01M4/96H01M8/10
CPCH01M4/8605H01M4/861H01M4/8657H01M4/886H01M4/921H01M8/1004H01M2008/1095Y02P70/50Y02E60/50H01M4/88
Inventor 角谷修冲山玄铃木孝柴田徹雄神山阳一渡边秀树伊达知子平野芳树
Owner HONDA MOTOR CO LTD
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