Fuel cell membranes and catalytic layers

Details Fuel cell membranes and catalytic layers Fuel cell membranes and catalytic layers

2006-11-14

2006-11-14

Parker, Fred J. (Department: 1762)

Coating processes

Solid particles or fibers applied

Plural particulate materials applied

C427S422000, C427S426000, C427S427400, C118S310000, C118S313000

Reexamination Certificate

active

07135205

ABSTRACT:
To form an ionomer-based catalytic layer on a porous substrate, a heat source (40) is used to dry an ionomer-containing spray (46) so that it does not substantially liquid flow on the substrate (14). The ionomer spray (46) may contain a catalyst. A spray (46) of mixed material for forming the catalytic layer is entrained by a gas stream and is heated and directed to a substrate surface (12). For hydrogen/oxygen fuel cells, catalytic material is incorporated into the proton-conducting membrane (56) to convert diffusing oxygen and hydrogen to water to reduce potential loss at the electrodes and maintain hydration of the proton-conducting membrane (56).

REFERENCES:
patent: 3857737 (1974-12-01), Kemp et al.
patent: 4177159 (1979-12-01), Singer
patent: 6132653 (2000-10-01), Hunt et al.
patent: 2003-001024 (2003-01-01), None
patent: 2002-0010436 (2002-02-01), None
patent: 2002-0054749 (2002-07-01), None
English language abstract of Korean Publication No. 2002-0010436.
English language abstract of Korean Publication No. 2002-0054749.
English language abstract of Japanese Publication No. 2003-001024.

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