Chemistry: electrical current producing apparatus – product – and – Fuel cell – subcombination thereof – or method of making or... – Fuel cell with solid electrolyte
Reexamination Certificate
2011-03-01
2011-03-01
Cantelmo, Gregg (Department: 1726)
Chemistry: electrical current producing apparatus, product, and
Fuel cell, subcombination thereof, or method of making or...
Fuel cell with solid electrolyte
C429S479000, C429S481000
Reexamination Certificate
active
07897291
ABSTRACT:
A membrane electrode assembly including: a solid polymer electrolyte membrane having proton conductivity; a cathode electrode catalyst layer disposed on one side of the solid polymer electrolyte membrane; an anode electrode catalyst layer disposed on the other side of the solid polymer electrolyte membrane; and two gas diffusion layers disposed on a side of the cathode electrode catalyst layer and a side of the anode electrode catalyst layer, respectively; wherein the gas diffusion layer in the anode side is smaller in contact angle to water than the gas diffusion layer in the cathode side. The membrane electrode assembly also includes at least two coating layers different in properties from each other between the gas diffusion layer and the cathode electrode catalyst layer, and at least two coating layers different in properties from each other between the gas diffusion layer and the anode electrode catalyst layer.
REFERENCES:
patent: 5840414 (1998-11-01), Bett et al.
patent: 6428722 (2002-08-01), Furuya
patent: 2003/0104267 (2003-06-01), Haridoss et al.
patent: 06-052871 (1994-02-01), None
patent: 06-275282 (1994-09-01), None
patent: 2004-031325 (2004-01-01), None
Asano Yoichi
Takahashi Ryoichiro
Tanaka Shintaro
Yamawaki Takuma
Arent & Fox LLP
Cantelmo Gregg
Honda Motor Co. Ltd.
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