Polymeric membrane electrochemical cell operating at temperatures above 100.degree. C.
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United States of America Patent
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Dec 5, 2000
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app pub date -
Dec 7, 1998
filing date -
Dec 10, 1997
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Abstract
A proton exchange membrane comprising a perfluorosulfonic acid having silica particles embedded therein at a concentration of 0.01 to 5% by weight, said particles having a dimension of 0.001 to 10 micrometers, the membrane having a crystalline phase and an amorphous phase in a ratio adjusted by controlled thermal treatment at a temperature higher than the glass transition temperature, an electrochemical cell containing said membrane and a process for oxidizing a fuel in said electrochemical cell.
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