Proton exchange membrane fuel cell using solid electrolyte membrane of sheet silicate minerals and an intercalation compound
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United States of America Patent
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Issued Date -
Mar 15, 2007
app pub date -
Oct 20, 2003
filing date -
Oct 22, 2002
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Abandoned
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Abstract
A solid proton exchange membrane and a membrane-electrode assembly (MEA) for use in fabricating an inexpensive and efficient proton exchange fuel cell (PEFC) which enables direct use of an organic fuel without a reformer and use of hydrogen gas. In particular, an electrochemical cell including a solid electrolyte membrane made of one or plural kinds of layered silicate minerals or intercalation compounds. The layered silicate minerals can be easily fabricated into a solid electrolyte membrane which shows a 'molecular sieve effect' on the target fuel if the density and impregnated liquid contents are properly controlled. The catalyst can be selected from a wide range of candidate materials. The use of the layered silicate mineral allows to fabricate an inexpensive direct methanol fuel cell (DMFC) and a realistic direct ethanol fuel cell (DEFC). Furthermore, an energy-efficient PEFC using hydrogen gas can also be produced therefrom.
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