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Method of manufacturing membrane electrode assembly, and membrane electrode assembly

A membrane electrode assembly and electrolyte technology, applied in the direction of electrical components, battery electrodes, final product manufacturing, etc., can solve problems such as difficult matrix materials

Inactive Publication Date: 2009-01-28
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, in order to keep the base material in a sheet shape, it is necessary to increase the strength of the base material to a necessary degree, so it is very difficult to make the base material very thin

Method used

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  • Method of manufacturing membrane electrode assembly, and membrane electrode assembly
  • Method of manufacturing membrane electrode assembly, and membrane electrode assembly
  • Method of manufacturing membrane electrode assembly, and membrane electrode assembly

Examples

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Embodiment

[0046] according to figure 1 The flowchart shown in the manufacturing MEA 24 (as Image 6 configuration shown), and the fuel cell 100 was manufactured using the thus manufactured MEA 24 . exist( figure 1 In step S105 of the shown flowchart, DENKA BLACK (manufactured by Denka Kagaku KogyoKabushiki Kaisha) serving as carbon black and PVDF serving as a waterproof material are added to the mixing vessel 400 (as figure 2 shown) in the NMP-containing solvent, and diffused in the solvent, thereby obtaining the gas diffusion layer slurry 200. In this process, the above-mentioned materials were mixed to manufacture a gas diffusion layer slurry 200 having the following composition: carbon black (DENKA BLACK) 2.5 wt %; PVDF 2.5 wt %; and NMP 95 wt %. Then, according to the following spraying conditions, the gas diffusion layer slurry 200 is spray-dried to manufacture the gas diffusion layer powder 300: the spray pressure is 0.1 MPa (the spray pressure means that when the gas diffusio...

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Abstract

The present invention discloses a method of manufacturing a membrane electrode assembly for a fuel cell, which includes: producing a gas diffusion layer powder that is used to form a gas diffusion layer; forming a catalyst layer on an electrolyte membrane; and forming the gas diffusion layer on the catalyst layer by depositing the gas diffusion layer powder on the catalyst layer.

Description

technical field [0001] The present invention relates to techniques for manufacturing membrane electrode assemblies for fuel cells. Background technique [0002] A fuel cell may include a membrane electrode assembly (hereinafter "MEA"). The MEA includes an electrolyte membrane, a catalyst layer formed on each side of the electrolyte membrane, and a gas diffusion layer formed on the catalyst layer. In the gas diffusion layer, a reaction gas (such as an oxidizing gas) supplied to the MEA is diffused in such a manner that the reaction gas is supplied to the entire area of ​​the MEA, and water generated by an electrochemical reaction occurring in the catalyst layer is discharge. Japanese Patent Application Publication No. 2003-203646 (JP-A-203646) describes a gas diffusion layer including a waterproof layer formed by applying a paste containing a waterproof material to a conductive substrate in the form of a sheet material such as carbon paper or carbon cloth. [0003] There ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M8/02
CPCH01M8/0245H01M8/0234H01M4/886Y02E60/521H01M8/0239H01M8/1004H01M8/023H01M4/881Y02E60/50Y02P70/50
Inventor 奥村畅夫小林宣之池田彻畑中达也
Owner TOYOTA JIDOSHA KK
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