Chemistry: electrical current producing apparatus – product – and – Fuel cell – subcombination thereof – or method of making or... – Fuel cell with solid electrolyte
Reexamination Certificate
2011-04-26
2011-04-26
Dove, Tracy (Department: 1726)
Chemistry: electrical current producing apparatus, product, and
Fuel cell, subcombination thereof, or method of making or...
Fuel cell with solid electrolyte
C429S480000
Reexamination Certificate
active
07931996
ABSTRACT:
A fuel cell (40) includes first and second catalysts (12′), (14′) secured to opposed surfaces of an electrolyte (16′); a first flow field (26′) secured in fluid communication with the first catalyst (12′) defining a plurality of flow channels (30A′,30B′,30C′,30D′) between a plurality of ribs (32A′,32B′,32C′,32D′,32E′) of the first flow field (26′); and a backing layer (42) secured between the first flow field (26′) and the first catalyst (12′). The backing layer (42) includes a carbon black, a hydrophobic polymer, and randomly-dispersed carbon fibers (44). The carbon fibers (44) are at least twice as long as a width (46) of the flow channels (30A′,30B′,30C′,30D′) defined in the adjacent first flow field (26′). The backing layer (42) replaces a known substrate (22) and diffusion layer (18).
REFERENCES:
patent: 5635039 (1997-06-01), Cisar et al.
patent: 6127059 (2000-10-01), Kato
patent: 6667127 (2003-12-01), Beattie et al.
patent: 6896991 (2005-05-01), Okamoto
patent: 6960407 (2005-11-01), Shibata et al.
patent: 2003/0124414 (2003-07-01), Hertel et al.
Chisholm, Jr. Malcolm J.
Dove Tracy
UTC Power Corporation
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