Gas diffusion electrode, solid polymer electrolyte membrane, process for the production thereof and solid polymer electrolyte fuel cell

摘要

A gas diffusion electrode for solid polymer electrolyte fuel cell comprising a gas diffusion electrode and a catalyst layer, characterized in that the catalyst layer is provided with a catalytic substance and an ion exchange resin having pores. In this arrangement, a three-phase boundary can be provided also inside the catalyst layer while maintaining sufficient electron conductivity, capability of supplying reaction gas and protonic conductance, making it possible to enhance the polarization characteristics and power density.