Fuel cell assembly having long life characteristics
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United States of America Patent
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Jul 27, 2010
Grant Date -
Mar 4, 2010
app pub date -
Nov 10, 2009
filing date -
Dec 29, 2004
priority date (Note) -
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Abstract
An example fuel cell assembly includes a separator plate. Non-porous and hydrophobic flow field layers are associated with the separator plate. An electrolyte retaining matrix comprises silicon carbide powder and has a mean particle size of about 3 microns and a thickness of about 0.05 mm Hydrophilic substrates are associated with catalyst layers. The hydrophilic substrates are about 70% porous and have a void volume that is about 40% filled with transferable phosphoric acid in an initial condition. A condensation zone cools a vapor passing from the assembly to less than about 140° C.
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