Fuel cell membrane containing zirconium phosphate

Details Fuel cell membrane containing zirconium phosphate Fuel cell membrane containing zirconium phosphate

2004-05-21

2010-06-15

Yuan, Dah-Wei D (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

C429S006000

Reexamination Certificate

active

07736780

ABSTRACT:
The present invention provides for a compound having the following structure: Zr(O3PZqYnX)2-m(03PR)m, wherein X=a functional group such as CO2H, PO(OH)2, and SO3H, and SO2NHSO2W, wherein W=aryl of 6 to 10 carbon atoms or Y; Y=perfluoro-linear, branched or cyclic alkylene group, wherein the alkylene is 1-20 carbon atoms, or a fluorinated group containing at least one substituent selected from the group consisting of oxygen, chlorine and bromine; Z=alkylene of 1-12 carbon atoms, aryl of 6-10 carbon atoms, or a heterocyclic aryl group of 3-10 carbons atoms; R=alkyl of 1-12 carbon atoms, aryl of 6-10 carbon atoms, substituted alkyl, or substituted aryl, wherein the substituent is selected from the group consisting of F, Cl, perfluoroalkyl, alkyl of 1-12 carbon atoms and aryl of 6-10 carbon atoms; n=0 or 1; q=0 or 1; and m=0 to 1.5; with the proviso that when n=0, and q=1, Z=at least one heterocyclic group having 3 to 10 carbon atoms, 1 to 5 nitrogen atoms and 0 to 4 oxygen atoms. The invention also provides a polymer electrolyte membrane, a catalyst coated membrane and a fuel cell having this compound.

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P. Costamagna et. al., Nafion 115/Zirconium Phosphate Composite Membranes for Operation of PEMFC'S Above 100 C, Electrochimica ACTA, 2002, vol. 47:1023-1033.

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