Proton-conducting polymer membrane containing polymers with sulfonic acid groups that are covalently bonded to aromatic groups, membrane electrode unit, and use thereof in fuel cells
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United States of America Patent
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Issued Date -
Mar 8, 2007
app pub date -
Sep 4, 2004
filing date -
Sep 4, 2003
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Abstract
Proton-conducting polymer membrane containing polymers with sulfonic acid groups that are covalently bonded to aromatic groups, membrane-electrode unit, and use thereof in fuel cells The present invention relates to a proton-conducting polymer membrane comprising polymers with sulfonic acid groups bonded covalently to aromatic groups and polymers comprising phosphonic acid groups, obtainable by polymerizing monomers comprising phosphonic acid groups.
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