Chemistry: electrical current producing apparatus – product – and – Fuel cell – subcombination thereof – or method of making or... – Fuel cell with solid electrolyte
Reexamination Certificate
2011-08-09
2011-08-09
Hodge, Robert (Department: 1729)
Chemistry: electrical current producing apparatus, product, and
Fuel cell, subcombination thereof, or method of making or...
Fuel cell with solid electrolyte
C429S454000, C429S465000, C429S479000, C429S492000, C252S062200
Reexamination Certificate
active
07993791
ABSTRACT:
A self-humidifying proton exchange membrane (PEM) composition, a membrane-electrode assembly, and a fuel cell. The PEM composition comprises (a) a proton-conducting polymer; (b) a catalyst that promotes the chemical reaction between hydrogen and oxygen molecules to generate water in the membrane, and (c) a deliquescent material dispersed in this polymer. The amount of catalyst is preferably 0.01%-50% by weight on the basis of the polymer weight. The catalyst is preferably a metal catalyst selected from the group consisting of platinum, gold, palladium, rhodium, iridium, ruthenium, and mixtures and alloys thereof. Suitable deliquescent materials include, but are not limited to, calcium chloride, calcium bromide, potassium biphosphate, potassium acetate and combinations thereof. A deliquescent material absorbs and retains an essentially constant amount of moisture to keep the proton mobile in the PEM structure. The fuel cell containing such a PEM composition can be used in a higher temperature and/or lower-humidity environment.
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U.S. Appl. No. 10/657,038, filed Sep. 8, 2003, B. Z. Jang.
Guo Jiusheng
Jang Bor Z.
Zhamu Aruna
Barrow Amanda
Hodge Robert
NANOTEK Instruments, Inc.
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