GAS DIFFUSION LAYER FOR BATTERY, MEMBRANE ELECTRODE ASSEMBLY FOR BATTERY USING THE GAS DIFFUSION LAYER FOR BATTERY, MEMBER FOR BATTERY, BATTERY, AND METHOD FOR PRODUCING THE GAS DIFFUSION LAYER FOR BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a gas diffusion layer for batteries smoothing a conductive porous layer surface and having a moderate elastic modulus.SOLUTION: A gas diffusion layer for batteries includes a first conductive porous layer containing a conductive carbon material and a high molecular weight polymer and a second conductive porous layer containing a conductive carbon material and a high molecular weight polymer. The first conductive porous layer has a surface roughness at a surface of 1.0-5.0 μm, the surface being not in contact with the second conductive porous layer, and the high molecular weight polymer in the second conductive porous layer constitutes a three-dimensional network structure.SELECTED DRAWING: None