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GAS DIFFUSION LAYER OF SOLID POLYMER FUEL CELL, FILM-ELECTRODE ASSEMBLY INCLUDING THE GAS DIFFUSION LAYER, MANUFACTURING METHOD FOR THE GAS DIFFUSION LAYER AND SLURRY USED IN MANUFACTURING THE GAS DIFFUSION LAYER
GAS DIFFUSION LAYER OF SOLID POLYMER FUEL CELL, FILM-ELECTRODE ASSEMBLY INCLUDING THE GAS DIFFUSION LAYER, MANUFACTURING METHOD FOR THE GAS DIFFUSION LAYER AND SLURRY USED IN MANUFACTURING THE GAS DIFFUSION LAYER
PROBLEM TO BE SOLVED: To provide a gas diffusion layer of a solid polymer fuel cell having both high gas permeability estimated by IP gas permeability and high conductivity estimated by cross-sectioned pressurization resistivity value.SOLUTION: A gas diffusion layer has a porous aggregate structure 30 composed of fusion-bonded organic fiber OF thermally fused by heating, and because in the porous aggregate structure 30 carbon fiber CF is bound with each other with conductive particulates by a binder resin R, the porous aggregate structure 30 with relatively high rigidity by mutual fusion of relatively small amount of the fusion-bonded organic fiber OF is formed in a gas diffusion layer 18(20). Therefore, the gas diffusion layer 18(20) with both high gas permeability and high conductivity at pressurization can be obtained.
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