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1. (WO2006126613) SEPARATOR FOR FUEL CELL AND METHOD FOR PRODUCING SAME

Pub. No.:    WO/2006/126613    International Application No.:    PCT/JP2006/310399
Publication Date: Nov 30, 2006 International Filing Date: May 24, 2006
IPC: H01M 8/02
H01M 8/10
Applicants: HITACHI CABLE, LTD.
日立電線株式会社
WASHIMA, Mineo
和島 峰生
SEIDO, Masahiro
清藤 雅宏
SASAOKA, Takaaki
笹岡 高明
NOMURA, Katsumi
野村 克巳
Inventors: WASHIMA, Mineo
和島 峰生
SEIDO, Masahiro
清藤 雅宏
SASAOKA, Takaaki
笹岡 高明
NOMURA, Katsumi
野村 克巳
Title: SEPARATOR FOR FUEL CELL AND METHOD FOR PRODUCING SAME
Abstract:
Disclosed is a separator for fuel cells which is decreased in the amount of an expensive noble metal used as a raw material while being maintained to be conductive to the MEA. This separator has durability and corrosion resistance to very corrosive substances such as fluorine ions or hydrofluoric acid. Also disclosed is a method for producing such a separator for fuel cells. Specifically disclosed is a metal separator (15, 17) which is used in a solid polymer fuel cell using a fluorine-containing solid polymer electrolyte membrane. This metal separator (15, 17) comprises a stainless steel base (20) processed to have a plurality of fuel gas channels (14). A pure Ti layer (21) is formed on the surface of the base (20); a Pd layer (23) is formed on a surface of the pure Ti layer (21) on the side of the fluorine-containing solid polymer electrolyte membrane; and a composite metal layer (22) is made of the pure Ti layer (21) and the Pd layer (23) by alloying at least a part of the Pd layer (23) joined with the surface of the pure Ti layer (21) through a heat treatment.