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Gradient isolator for flow field of fuel cell assembly

United States Patent

June 15, 1999
View the Complete Patent at the US Patent & Trademark Office
Isolator(s) include isolating material and optionally gasketing material strategically positioned within a fuel cell assembly. The isolating material is disposed between a solid electrolyte and a metal flow field plate. Reactant fluid carried by flow field plate channel(s) forms a generally transverse electrochemical gradient. The isolator(s) serve to isolate electrochemically a portion of the flow field plate, for example, transversely outward from the channel(s), from the electrochemical gradient. Further, the isolator(s) serve to protect a portion of the solid electrolyte from metallic ions.
Ernst; William D. (Troy, NY)
Plug Power, L.L.C. (Latham, NY)
08/ 958,163
October 28, 1997
STATEMENT OF GOVERNMENT RIGHTS The Government of the United States of America has rights in this invention pursuant to Contract No. DE-AC02-94CE50389 awarded by the U.S. Department of Energy.