GAS DIFFUSION ELECTRODE BASE MATERIAL, METHOD FOR PRODUCING SAME, GAS DIFFUSION ELECTRODE, MEMBRANE ELECTRODE ASSEMBLY AND SOLID POLYMER FUEL CELL

摘要

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.