Catalytic bipolar interconnection plate for use in a fuel cell

Details Catalytic bipolar interconnection plate for use in a fuel cell Catalytic bipolar interconnection plate for use in a fuel cell

1994-10-12

1996-03-05

Willis, Jr., Prince

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

429 26, 429 30, 429 38, 429 39, 429 40, 429 44, H01M 802

Patent

active

054966558

ABSTRACT:
A bipolar interconnection plate for use between adjacent fuel cell units in a stacked fuel cell assembly. Each plate is manufactured from an intermetallic composition, examples of which include NiAl or Ni.sub.3 Al which can catalyze steam reforming of hydrocarbons. Distributed within the intermetallic structure of the plate is a ceramic filler composition. The plate includes a first side with gas flow channels therein and a second side with fuel flow channels therein. A protective coating is applied to the first side, with exemplary coatings including strontium-doped or calcium-doped lanthanum chromite. To produce the plate, Ni and Al powders are combined with the filler composition, compressed at a pressure of about 10,000-30,000 psi, and heated to about 600.degree.-1000.degree. C. The coating is then applied to the first side of the completed plate using liquid injection plasma deposition or other deposition techniques.

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