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|1. (WO2018012345) GAS DIFFUSION ELECTRODE BASE MATERIAL, METHOD FOR PRODUCING SAME, GAS DIFFUSION ELECTRODE, MEMBRANE ELECTRODE ASSEMBLY AND SOLID POLYMER FUEL CELL|
|Applicants:||TORAY INDUSTRIES, INC.
|Title:||GAS DIFFUSION ELECTRODE BASE MATERIAL, METHOD FOR PRODUCING SAME, GAS DIFFUSION ELECTRODE, MEMBRANE ELECTRODE ASSEMBLY AND SOLID POLYMER FUEL CELL|
The present invention addresses the problem of improving water drainage performance in a gas diffusion electrode formed from a carbon fiber nonwoven fabric. The present invention is a gas diffusion electrode base material that is substantially formed from a carbon fiber nonwoven fabric, wherein the carbon fiber nonwoven fabric has a weight pattern in which high weight regions having relatively high weights and low weight regions having relatively low weights are arranged in a plane, and also has a relief pattern, in which recesses and projections are arranged on at least one surface, said relief pattern being formed independently from the weight pattern.