METHOD OF PROTECTIVE LAYER OF METAL INTERCONNECT OF SOLID OXIDE FUEL CELL, AND PROTECTIVE LAYER MANUFACTURED USING THE SAME

摘要

The present invention relates to ceramic powder for a protective layer for a metallic bipolar plate of a solid oxide fuel cell, and more specifically, to a manufacturing method of ceramic powder for a protective layer for a metallic bipolar plate of a solid oxide fuel cell, which comprises a first step of manufacturing a mixture by mixing a manganese compound and a copper compound with distilled water; a second step of manufacturing sol by reacting the mixture manufactured at the first step with ethylene glycol and citric acid; a third step of forming gel by heating the sol manufactured at the second step; a fourth step of firstly heat-processing the gel formed at the third step; and a fifth step of manufacturing ceramic powder by secondly heat-processing the get heat-processed at the fourth step. According to the present invention, the protective layer having a spinel structure and including manganese (Mn) and copper (Cu) is coated on the surface of a metallic bipolar plate of a solid oxide fuel cell, thereby preventing the oxidation of the metallic bipolar plate and preventing the interfacial resistance from increasing, and has a high electric conductivity, thereby enhancing the efficiency of the solid oxide fuel cell.