Method for producing gas diffusion electrode and method 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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C029S623100, C429S535000, C502S101000, C502S172000

Reexamination Certificate

active

07883817

ABSTRACT:
The present invention provides a gas diffusion electrode capable of sufficiently preventing not only degradation of MEA during storage but also degradation of initial characteristics and durability during the time period from production to initial use, and a polymer electrolyte fuel cell including the gas diffusion electrode. The gas diffusion electrode includes a catalyst layer in which A1representing a total mass of organic substance comprising alcohol, a partial oxide of the alcohol, a product of intramolecular dehydrogenation reaction of the alcohol, a product of intermolecular condensation reaction of the alcohol, a product of intermolecular condensation reaction between the alcohol and the partial oxide and a product of intermolecular condensation reaction of the partial oxide, E1representing a total mass of carbon powder and G1representing a total mass of cation exchange resin are controlled to satisfy {100×A1/(E1+G1)}≦0.05.

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Chinese Office Action with English Translation issued in Chinese Patent Application No. CN 200580019372.8 dated on Mar. 14, 2008.

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