Fuel cell membrane electrode assembly

摘要

A resin frame equipped membrane electrode assembly includes a membrane electrode assembly and a resin frame member. The membrane electrode assembly includes a solid polymer electrolyte membrane and an anode, and a cathode sandwiching the solid polymer electrolyte membrane. The resin frame member is formed around the solid polymer electrolyte membrane. The outer end of an electrode catalyst layer of the cathode protrudes beyond the outer end of a gas diffusion layer, and the resin frame member includes an inner extension protruding toward the outer periphery of the cathode to contact the outer end of the solid polymer electrolyte membrane. The inner extension of the resin frame member has an overlapped portion overlapped with the outer end of the electrode catalyst layer.

主权项

1. A fuel cell membrane electrode assembly comprising:
a membrane electrode assembly including a solid polymer electrolyte membrane, an anode provided on one surface of the solid polymer electrolyte membrane, and a cathode provided on another surface of the solid polymer electrolyte membrane, the anode having an anode catalyst layer and an anode diffusion layer, the cathode having a cathode catalyst layer and a cathode diffusion layer, an outer end of the anode catalyst layer protruding outward beyond an outer end of the cathode catalyst layer; and a resin frame member provided around the solid polymer electrolyte membrane, wherein: the outer end of the cathode catalyst layer protrudes outward beyond an outer end of the cathode diffusion layer; the resin frame member includes an inner extension protruding toward an outer periphery of the cathode to contact an outer end of the solid polymer electrolyte membrane; and the inner extension has an overlapped portion overlapped with the outer end of the cathode catalyst layer.