Process for producing membrane/electrode assembly for...

Chemistry: electrical current producing apparatus – product – and – Fuel cell – subcombination thereof – or method of making or... – Fuel cell with solid electrolyte

Reexamination Certificate

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C429S480000, C429S479000, C429S492000, C429S491000, C429S523000, C429S534000, C429S535000

Reexamination Certificate

active

08007953

ABSTRACT:
To provide a membrane/electrode assembly for polymer electrolyte fuel cells capable of obtaining a high output voltage even in a high current density region, by providing electrodes having good gas diffusion properties, conductivity, water repellency and durability.A membrane/electrode assembly for polymer electrolyte fuel cells, comprising; an anode and a cathode each having a catalyst layer containing a catalyst and having a gas diffusion layer; and a polymer electrolyte membrane disposed between the catalyst layer of the anode and the catalyst layer of the cathode, characterized in that at least one of the above anode and cathode, has a carbon layer containing a fluorinated ion exchange resin and carbon nanofibers having a fiber diameter of from 1 to 1,000 nm and a fiber length of at most 1,000 μm, disposed between the catalyst layer and the gas diffusion layer.

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U.S. Appl. No. 12/641,960, filed Dec. 18, 2009, Tanuma.
U.S. Appl. No. 12/512,122, filed Jul. 30, 2009, Tanuma.
U.S. Appl. No. 12,859,304, filed Aug. 19, 2010, Tanuma.
U.S. Appl. No. 12/910,935, filed Oct. 25, 2010, Tanuma.

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