METAL SEPARATOR FOR SOLID OXIDE REGENERATIVE FUEL CELL COATED WITH SPINEL CONDUCTIVE OXIDE FILM, PREPARATION METHOD THEREOF AND SOLID OXIDE REGENERATIVE FUEL CELL COMPRISING THE SAME

摘要

The present invention relates to a metal separator for a solid oxide regenerative fuel cell coated with a spinel conductive oxide film, which can inhibit the growth of an oxide film and the volatilization of metal on the surface of a metal separator by adding yttrium to manganese-cobalt spinel. The conductive oxide film coated on the metal separator, in accordance with the present invention, is capable of inhibiting the movement of oxygen through a grain boundary as yttrium is separated in a spinel grain boundary, thereby preventing the surface of the metal separator from being exposed to the air and vapor when the solid oxide regenerative fuel cell is driven under high temperature. The conductive oxide film coated on the metal separator is also capable of greatly improving the stability of a solid oxide regenerative fuel cell stack by preventing the growth of a coated electrode by the metal volatilization from the surface of the metal separator and an insulating oxide film on the surface of the separator.