Patent ID: 7232627
Filing Date: 2007-06-19
Classification: H01M,Y02E

Abstract:
1. An electrode for a solid polymer fuel cell, comprising: a gas diffusion layer for uniformly diffusing reactant gases; an electrode catalyst layer disposed between a solid polymer membrane of the fuel cell and the gas diffusion layer to support a catalyst for reaction of the diffused reactant gases; and a water-holding layer disposed between the gas diffusion layer and the electrode catalyst layer to enhance a water-retaining capability of the gas diffusion layer, wherein the electrode catalyst layer is made porous to facilitate drainage of water from the electrode catalyst layer; and wherein the electrode catalyst layer includes a catalyst, a carbon powder for supporting the catalyst, an ion conductive polymer, and a crystalline carbon fiber; and wherein the gas diffusion layer includes, in sequence from an eletrode catalyst layer side: a water-repellent layer containing an ion conductive polymer, a carbon powder, and a crystalline carbon fiber; and a carbon cloth layer.