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US 2011/0218255 A1Published application
Arylene-fluorinated-sulfonimide ionomers and membranes for fuel cells
AssigneeE. I. Du Pont de Nemours and Company
InventorMark F. Teasley
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Abstract
The preparation of aromatic sulfonimide polymers useful as membranes in electrochemical cells is described.
Claims11
A polymer comprising repeating units of Formula (I):
- wherein Rf and R′f are independently a straight chain, branched or cyclic, perfluorinated alkylene groups having from 1 to 20 carbon atoms and optionally substituted with one or more ether oxygens or halogens;
- m is 0 to 6;
- and
- M is one or more of monovalent cation.
1 more element
Dependencies are inferred from the claim text.