GAS DIFFUSION LAYER WITH CONTROLLED DIFFUSIVITY OVER ACTIVE AREA
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United States of America Patent
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Issued Date -
Aug 28, 2008
app pub date -
Feb 22, 2007
filing date -
Feb 22, 2007
priority date (Note) -
Abandoned
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Abstract
A diffusion medium for use in a PEM fuel cell comprising a thin perforated layer having variable size and frequency of perforation patterns incorporated into a microporous layer on a first side of a porous substrate layer, wherein the diffusion medium is adapted to improve water management and performance of the fuel cell.
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