GAS DIFFUSION ELECTRODE FOR FUEL CELL, MEMBRANE ELECTRODE ASSEMBLY USING THE GAS DIFFUSION ELECTRODE, AND FUEL CELL SINGLE CELL

摘要

PROBLEM TO BE SOLVED: To provide a gas diffusion electrode for a fuel cell, capable of efficiently supplying reaction gas into an electrode catalyst layer by promptly discharging liquid water generated in a fuel cell.SOLUTION: A gas diffusion electrode base material for fuel cells of the present invention includes a gas diffusion layer on an electrode catalyst layer, the gas diffusion layer including a particle layer and a fiber layer, and the particle layer being laminated in contact with the catalyst layer. The particle layer has a recessed portion communicating with gaps of the fiber layer, on a fiber layer side.SELECTED DRAWING: Figure 1