Patent ID: 8445163

Claim:
A membrane-electrode assembly for a fuel cell, comprising: an anode; a cathode facing the anode; and a polymer electrolyte membrane between the anode and the cathode, wherein the cathode comprises an electrode substrate and a catalyst layer supported by the electrode substrate, wherein the catalyst layer comprises mesopores having an average pore diameter ranging from about 20 nm to about 40 nm and has a mesopore volume ranging from about 0.013 cm 3 /g to about 0.04 cm 3 /g, wherein the catalyst layer comprises macropores having an average pore diameter ranging from about 0.1 μm to about 5 μm and has a macropore volume ranging from about 0.27 cm 3 /g to about 0.3 cm 3 /g, and wherein the catalyst layer has a specific surface area (BET) of between about 3.16 m 2 /g and about 5.06 m 2 /g.