Ion exchange materials
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United States of America Patent
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Oct 24, 2006
Grant Date -
Feb 5, 2004
app pub date -
Mar 21, 2001
filing date -
Mar 22, 2000
priority date (Note) -
Expired
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Abstract
A method of preparing an ion-conducting material, for example membrane, having reduced sensitivity to water includes a step of treating an ion-conducting polymeric material (especially a sulphonated polyaryletherketone and/or sulphone) which has at least some crystallinity or which is crystallizable with a means to increase its crystallinity. The ion-conducting material prepared may be used in a Membrane Electrode Assembly of a fuel cell.
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