Polymer electrolyte membrane electrochemical fuel cells and stacks with adhesively bonded layers
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United States of America Patent
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Dec 17, 2002
Issued Date -
N/A
app pub date -
Mar 10, 2000
filing date -
Mar 29, 1997
priority date (Note) -
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Abstract
An electrochemical cell stack comprises a plurality of membrane electrode assemblies interposed between pairs of separator plates. The stack comprises adhesively bonded layers. Preferably each membrane electrode assembly is adhesively bonded to the adjacent pair of separator plates. The adhesive bond between the plate and membrane electrode assembly preferably provides a substantially gas and liquid-tight seal around the perimeter of the electrochemically active area of the membrane electrode assembly and around any fluid manifold openings formed therein. Alternatively, or in addition, adjoining pairs of separator plates in an electrochemical cell stack may be adhesively bonded together. Such pairs of adhesively bonded plates may define cooling spaces between neighboring cells. Stacks comprising a plurality of individual cell modules may be formed, each module comprising a membrane electrode assembly bonded to a pair of separator plates.
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