Cation-conducting or proton-conducting ceramic membrane infiltrated with an ionic liquid, method for the production thereof and use of the same
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United States of America Patent
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Issued Date -
Feb 26, 2004
app pub date -
Jun 13, 2003
filing date -
Dec 13, 2000
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Abandoned
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Abstract
The invention relates to a cation- and/or proton-conducting membrane, to a process for producing it, and to its use. The membrane of the invention represents a novel class of solid, proton-conducting membranes. It is based on a porous and flexible ceramic membrane described in PCT/EP98/05939. The latter is modified so that it has ion-conducting properties. This membrane is subsequently treated with an ionic liquid. As a result of the use of the ionic liquid, the membrane of the invention has very good proton/cation conductivity even at temperatures above 100.degree. C. The proton/cation-conducting ceramic membrane remains flexible and may be used without problems as a membrane in a fuel cell.
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