Direct oxidation fuel cell system and membrane electrode...

Details Direct oxidation fuel cell system and membrane electrode... Direct oxidation fuel cell system and membrane electrode...

2005-11-10

2010-06-29

Ryan, Patrick (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Having earth feature

C429S047000, C429S006000, C429S010000, C429S006000

Reexamination Certificate

active

07745036

ABSTRACT:
A membrane electrode assembly for a direct oxidation fuel cell includes a proton-conductive electrolyte membrane and an anode and a cathode sandwiching the electrolyte membrane. The equivalent weight of the proton-conductive substance contained in the catalyst layer of the anode is greater than the equivalent weight of the proton-conductive substance contained in the catalyst layer of the cathode. This invention reduces the performance deterioration caused by repetitive swelling and contraction of the electrolyte contained in the catalyst layer upon changes in operating conditions or upon repetitive start and stop of operation, thereby making it possible to provide a fuel cell with a high output and high performance.

REFERENCES:
patent: 5573866 (1996-11-01), Van Dine et al.
patent: 5882810 (1999-03-01), Mussell et al.
patent: 2006/0083971 (2006-04-01), DeSimone et al.
patent: 09-213350 (1997-08-01), None

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