Cathode reactant flow field component for a fuel cell stack
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United States of America Patent
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Sep 24, 1996
Grant Date -
N/A
app pub date -
Oct 7, 1994
filing date -
Oct 7, 1994
priority date (Note) -
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Abstract
The reactant flow field on the cathode side of a fuel cell assembly is formed from a plate made from carbon particles that are bonded together by a fluorocarbon polymer binder. The cathode reactant flow field is non-porous, and is hydrophobic due to the presence of the poller binder. The carbon particles are preferably carbon flakes which pack together very tightly, and require only a minor amount of the polymer binder to form a solid plate. The plate will provide cathode reactant flow channels, will conduct electrons and heat and will minimize acid absorption in a fuel cell stack due to its hydrophobic nature.
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