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Corrosion resistant PEM fuel cell

United States Patent

5,624,769
April 29, 1997
View the Complete Patent at the US Patent & Trademark Office
The present invention contemplates a PEM fuel cell having electrical contact elements (including bipolar plates/septums) comprising a titanium nitride coated light weight metal (e.g., Al or Ti) core, having a passivating, protective metal layer intermediate the core and the titanium nitride. The protective layer forms a barrier to further oxidation/corrosion when exposed to the fuel cell's operating environment. Stainless steels rich in CR, Ni, and Mo are particularly effective protective interlayers.
Li; Yang (Troy, MI), Meng; Wen-Jin (Okemos, MI), Swathirajan; Swathy (West Bloomfield, MI), Harris; Stephen J. (Bloomfield, MI), Doll; Gary L. (Orion Township, Oakland County, MI)
General Motors Corporation (Detroit, MI)
08/ 577,397
December 22, 1995
The Government of the United States of America has rights in this invention pursuant to contract No. DE-AC02-90CH10435 awarded by the United States Department of Energy.