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US 7,411,022 B2Granted
Reinforced polymer electrolyte membrane
Assignee3M Innovative Properties Company
InventorsMiguel A. Guerra, Michael A. Yandrasits
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Abstract
A method is provided for making a reinforced polymer electrolyte membrane, such as may be used in electrolytic cells such as fuel cells, by mixing a sulfonate- or sulfonyl halide-functional polymer with a bisamidine compound and subsequently trimerizing the amidine groups of the bisamidine compound to form triazine linkages. The sulfonyl halide or sulfonate groups may then be converted to sulfonic acid groups, yielding a polymer electrolyte reinforced with a polytriazine.
Claims9
A polymer electrolyte membrane comprising an intimate mixture of:
- a) a first polymer comprising a fluorinated backbone and first pendant groups which comprise sulfonic acid groups;
- and
- b) a second polymer which is a fluorinated polytriazine.
Dependencies are inferred from the claim text.