Edge design for ePTFE-reinforced membranes for PEM fuel cells
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United States of America Patent
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Apr 30, 2013
Grant Date -
May 8, 2008
app pub date -
Nov 3, 2006
filing date -
Nov 3, 2006
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Abstract
Edge designs, especially for ePTFE-reinforced membranes for proton exchange membrane (PEM) fuel cells, wherein the designs provide a proton barrier at the electrode edge of the PEM fuel cell membrane electrode assembly (MEA) to provide, among other things, resistance to membrane chemical degradation. A portion of the ePTFE layer is imbibed with a proton-impermeable polymer at the electrode edge. The polymer can include, without limitation, B-staged epoxides, B-staged phenolics, hot melt thermoplastics, and/or thermosets or thermoplastics cast from liquid dispersions.
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