Acid-modified polybenzimidazole fuel cell elements
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United States of America Patent
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Feb 4, 1997
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Oct 27, 1995
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Aug 31, 1995
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Abstract
An electrolytic membrane for use in fuel cell includes a fluid-imbibed acidified polybenzimidazole resin. The resin is alkyl or aryl sulfonated or alkyl or aryl phosphonated, preferably with a degree of substitution of from 15 to about 60 per cent.
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