Start up of frozen fuel cell

Details Start up of frozen fuel cell Start up of frozen fuel cell

1998-06-05

2000-08-15

Wong, Edna

Chemistry: electrical current producing apparatus, product, and

Having magnetic field feature

429 22, 429 40, 429 41, 429 52, H01M 800, H01M 804, H01M 486, H01M 1044

Patent

active

06103410&

ABSTRACT:
During start up, a fuel cell is warmed to operating temperature by introducing a dilute hydrogen/air mixture into the normal process oxidant channels of the fuel cell where it reacts with a noble metal or noble metal alloy catalyst to produce heat at subflame temperatures. In one embodiment, catalyst is provided in a structure between the cathode and the process oxidant channels; if the structure is not sufficiently hydrophobic to allow the hydrogen/fuel mixture to reach it, such structure may be specially produced with hydrophobic regions to assure ice-free passages; in a structure with sufficient hydrophobic regions, only the catalyst need be added. In embodiments with a hydrophobic cathode, no structural modification is required; or a hydrophilic cathode may be provided with hydrophobic regions.

REFERENCES:
patent: 5879826 (1999-03-01), Lehman et al.
Hawley's Condensed Chemical Dictionary, 11th ed., pp. 28-29, 1987 *no month available.

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