Progresses in the Electrodeposition Preparation of Spinel Coatings on SOFC Ferritic Stainless Steel interconnectors

Solid oxide fuel cell (SOFC) is a kind of clean power generation system that converts the chemical energy of fuel into electrical energy through electrochemical oxidation-reduction reaction. Because of the low price, excellent process ability and good thermal expansion compatibility with adjacent components, ferritic stainless steel (FSS) has become an ideal material for the key component interconnector of SOFC in medium and low temperature environment. However, in the operating environment of SOFC, Cr compounds are easy to volatilize on FSS interconnector, resulting in "Cr poisoning" of the cathode. Preparation of a spinel coating on the FSS surface by electrodeposition technology can solve the problems of metal oxidation corrosion of the interconnector and Cr deposition on the cathode, which has become a research hotspot in this field in recent years. The problems, research status and progresses in the electrodeposition preparation of Mn-Co, Cu-Mn and Ni-Fe spinel protective coatings on SOFC ferritic stainless steel surface are reviewed, and the development prospects and directions are proposed.