Asahi Glass Company, Limited

Gm Global Technolgoy Operations, Inc.

Kohta Yamada

Shinji Terazono

Hiroshi Shimoda

Toshihiro Tanuma

Chunxin Ji

Seigo Kotera

Hubert Gasteiger

Susan Yan

Shinji Kinoshita

Bhaskar Sompalli

Hirokazu Wakabayashi

Widjaja Hardiyanto

Atsuo Okawara

A membrane/electrode assemblyfor a polymer electrolyte fuel cell, which comprises an anodehaving an anode catalyst layercontaining an anode catalyst and an ion-exchange resin, a cathodehaving a cathode catalyst layercontaining a cathode catalyst and an ion-exchange resin, and a polymer electrolyte membranedisposed between the anodeand the cathode, wherein the anode catalyst is one having platinum or a platinum alloy supported on a carbon, and the amount of platinum or a platinum alloy supported in the anode catalyst is from 1 to 25 mass %; and the anode catalyst layercontains fine particles made of at least one member selected from iridium oxide, iridium, ruthenium oxide and ruthenium, and the fine particles have a specific surface area of from 2 to 50 m/g.

Membrane/electrode assembly for polymer electrolyte fuel cell and process for producing membrane/electrode assembly for polymer electrolyte fuel cell

A process comprising: providing a substrate with a catalyst layer thereon; depositing a first ionomer overcoat layer over the catalyst layer, the first ionomer overcoat layer comprising an ionomer and a first solvent; drying the first ionomer overcoat layer to provide a first electrode ionomer overcoat layer; depositing a second ionomer overcoat layer over the first electrode ionomer overcoat layer, and wherein the second ionomer overcoat layer comprises an ionomer and a second solvent.

Method of making fuel cell components including a catalyst layer and a plurality of ionomer overcoat layers

To provide a membrane/electrode assembly and a method for operating a polymer electrolyte fuel cell, whereby power generation will not be terminated even when the power generation is initiated in such an environment that the temperature of the membrane/electrode assembly is at most 0&#xb0; C. A membrane/electrode assemblyfor polymer electrolyte fuel cells, which comprises an anodeand a cathodeeach having a catalyst layercontaining a proton-conductive fluoropolymer (A), and a polymer electrolyte membranecontaining a proton-conductive fluoropolymer (B), disposed between the anodeand the cathode, wherein each of the above proton-conductive fluoropolymer (A) and the above proton-conductive fluoropolymer (B) has an ion exchange capacity of from 1.4 to 1.8 meq/g dry resin, and each of the above proton-conductive fluoropolymer (A) and the above proton-conductive fluoropolymer (B) has a water content of at most 150 mass %.

Membrane/electrode assembly for polymer electrolyte fuel cells, and method for operating polymer electrolyte fuel cell

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Chiyoda-ku, Japan

Kohta Yamada