MANUFACTURING METHOD OF ELECTRODE CATALYST LAYER FOR SOLID POLYMER FUEL CELL, ELECTRODE CATALYST LAYER FOR SOLID POLYMER ELECTROLYTE FUEL CELL, MANUFACTURING METHOD OF MEMBRANE-ELECTRODE ASSEMBLY, AND MEMBRANE-ELECTRODE ASSEMBLY

PROBLEM TO BE SOLVED: To provide a manufacturing method of an electrode catalyst layer for a solid polymer fuel cell and the electrode catalyst layer for the solid polymer fuel cell, wherein when obtaining the solid polymer fuel cell, all of a gas channel, a proton conductive path, and a three-phase interface can be increased by using freeze-drying method. SOLUTION: The method is carried out through a process which includes: (1) a step of coating a dispersion liquid containing proton conductive polymer on a base material surface, freezing it before a solvent is dried, and drying is carried out in a vacuum; (2) a step of impregnating and drying a dispersion liquid of catalyst-carrying carbon into a porous membrane of the proton conductive polymer obtained in the step (1); and (3) a step of impregnating and drying the dispersion liquid of the proton conductive polymer in an intermediate into which the catalyst-carrying carbon is impregnated in pores of the porous membrane of the proton conductive polymer obtained in the step (2). COPYRIGHT: (C)2011,JPO&INPIT