PROCESS FOR PRODUCING MEMBRANE ELECTRODE ASSEMBLY FOR SOLID POLYMER ELECTROLYTE FUEL CELL, AND PROCESS FOR PRODUCING SOLID POLYMER ELECTROLYTE FUEL CELL

摘要

This invention provides a membrane electrode assembly for a solid polymer electrolyte fuel cell, which can realize a high output voltage in a broad current density range, and a process for producing a solid polymer electrolyte fuel cell. The production process for producing a solid polymer electrolyte fuel cell comprises a catalyst layer forming step of coating a first coating liquid containing a catalyst and an ion exchange resin on a base material regarding at least one of an anode and a cathode in a membrane electrode assembly for a solid polymer electrolyte fuel cell to form a catalyst layer, a gas diffusion layer forming step of coatinga second coating liquid containing a carbon fiber and an ion exchange resin onto the catalyst layer to form a gas diffusion layer as an outermost layer in the membrane electrode assembly for a solid polymer electrolyte fuel cell, and a separation step of separating the base material from the catalyst layer. The membrane electrode assembly for a solid polymer electrolyte fuel cell is disposed between two separators each having a surface with a gas flow passage formed therein so that the surface of the outermost layer is adjacent to the separators to render the gas diffusion layer and the separator adjacent to each other.