H - Electricity – 01 – M
Patent
H - Electricity
01
M
H01M 2/16 (2006.01) B08B 3/04 (2006.01) B23K 1/20 (2006.01) C23C 14/02 (2006.01) C23C 14/34 (2006.01) C23F 1/00 (2006.01) F16B 5/08 (2006.01)
Patent
CA 2645532
The present invention provides a metallic bipolar plate for fuel cells, including: a pair of metallic plates for fuel cells each including a substrate which contains a stainless steel, an Fe-Ni based alloy or an Ni-base alloy, has a front surface and a back surface, and has a plurality of channels of a reaction gas formed on the front surface; and a brazed portion joining the back surfaces of the substrates in such a way that the pair of metallic plates are made to face each other, wherein, in the pair of metallic plates, a thin layer of a noble metal is coated on an entirety of the front surface of each of the substrates or on at least a part of a convex portion between the plurality of channels of a reaction gas on the front surface of each of the substrates, and another thin layer of a noble metal having a thickness of from 0.5 to 60 nm is coated on an entirety of the back surface of each of the substrates or on at least a part including the brazed portion on the back surface of each of the substrates, and wherein the metallic bipolar plate has, directly below a brazing material in the brazed portion, a joint portion where the thin layer of a noble metal is not present and the brazing material and the substrate are directly joined with each other.
Hisada Tatsuo
Takagi Shinobu
Yagi Shinichi
Daido Tokushuko Kabushiki Kaisha
Riches Mckenzie & Herbert Llp
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