Patent ID: 8574780
Filing Date: 2013-11-05
Classification: H01M,Y02E,Y02P

Abstract:
1. A method of producing a fuel cell separator forming part of a unit cell of a fuel cell, said unit cell being formed by interposing an electrolyte electrode assembly between a pair of the fuel cell separators, said electrolyte electrode assembly including an anode, a cathode, and an electrolyte interposed between said anode and said cathode, the method comprising the steps of: heating said fuel cell separator to aggregate Fe in a surface layer of said fuel cell separator to form an Fe rich layer, and providing a Cr rich layer in an inner portion of said fuel cell separator by movement of Fe toward the surface layer, wherein applying an electrolytic treatment to said fuel cell separator to remove said Fe rich layer, and expose said Cr rich layer to the outside on a surface of said fuel cell separator.