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AssigneeAsahi Glass Company, Limited
InventorsSatoru HONMURA, Tetsuji Shimohira, Takashi SAEKI, Susumu SAITO
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A membrane/electrode assembly for a polymer electrolyte fuel cell capable of exhibiting high power generation performance constantly for a long period of time in a high temperature and low humidity environment, and a polymer electrolyte membrane whereby such a membrane/electrode assembly is obtainable. A polymer electrode membrane 15, comprising a proton conductive polymer which has an electrical conductivity of at least 0.07 S/cm at a temperature of 80° C. at a relative humidity of 40% and which has a water content of less than 15 mass; and a membrane/electrode assembly 10 comprising an anode 13 and a cathode 14 each having a catalyst layer 11, and a polymer electrolyte membrane 15 disposed between the anode 13 and the cathode 14.
A polymer electrolyte membrane comprising a proton conductive polymer which has an electrical conductivity of at least 0.07 S/cm at a temperature of 80° C. at a relative humidity of 40% and which has a water content of less than 150 mass %.
A membrane/electrode assembly for a polymer electrolyte fuel cell, comprising an anode and a cathode each having a catalyst layer, and a polymer electrolyte membrane disposed between the anode and the cathode, wherein the polymer electrolyte membrane comprises a proton conductive polymer which has an electrical conductivity of at least 0.07 S/cm at a temperature of 80° C. at a relative humidity of 40% and which has a water content of less than 150 mass %.
A method of operating a polymer electrolyte fuel cell having a membrane/electrode assembly for a polymer electrolyte fuel cell, wherein the membrane/electrode assembly comprises an anode and a cathode each having a catalyst layer, and a polymer electrolyte membrane disposed between the anode and the cathode, wherein the polymer electrolyte membrane comprises a proton conductive polymer which has an electrical conductivity of at least 0.07 S/cm at a temperature of 80° C. at a relative humidity of 40% and which has a water content of less than 150 mass %, which method comprises power generation by supplying an air at a relative humidity of at most 40% to the cathode while the temperature of the membrane/electrode assembly is maintained at 90° C. or higher.
Dependencies are inferred from the claim text.