Patent ID: 8187745

Claim:
A cathode for a fuel cell comprising an electrode catalyst layer, wherein the electrode catalyst layer comprises: a carried catalyst containing a conductive carrier and catalytic fine particles carried on the conductive carrier, the carried catalyst being incorporated therein at a weight of W C ; a proton-conductive inorganic oxide containing an oxide carrier and oxide particles carried on a surface of the oxide carrier; silicon oxide carried on the surface at a weight ratio of 0.1 to 0.5 times as much as the weight of the proton-conductive inorganic oxide, a weight ratio (W SA+SiO2 /W C ) between the weight W C of carried catalyst and a total weight (W SA+SiO2 ) of the proton-conductive inorganic oxide and the silicon oxide being confined to 0.01-0.25; and a proton-conductive organic polymer binder which is incorporated therein at a weight of W P , the weigh ratio (W P /W SA+SiO2 ) thereof relative to the total weight of the proton-conductive inorganic oxide and the silicon oxide being confined to 0.5-43.