In-situ formed CuFe2O4 spinel coating by electroplating method for solid oxide fuel cell interconnect

Fabrication and Oxidation Behavior of the Cu–Fe Spinel Coating for SOFC Steel Interconnect Applications

“…Until now, different coating methods have been used to form spinel coatings on FSS interconnects, including wet chemical methods (sol–gel method, screen printing, and dip-coating), − vacuum methods (magnetron sputtering and atomic layer deposition), − and electrodeposition. , Among these coating methods, dip-coating is an attractive method due to its controllable composition and thickness of the coating, high cost-effectiveness, production efficiency, high deposition rate, and maneuverability …”

Metallic Co with Reactive Element Oxide Composite Coatings for Solid Oxide Fuel Cell Interconnect Applications

“…Perovskite coatings have a high oxygen ion conductivity, which leads to the inward diffusion of oxygen ions, resulting in a thicker oxide scale; moreover, the high sintering temperature of perovskites makes it difficult for the coating to be dense, which is ineffective in protecting the metallic interconnects . Spinel not only has good electrical conductivity and matches the CTE of other components but also shows good absorption capacity for Cr and Cr oxides, which can inhibit Cr poisoning to the cathode. − Petric and Ling investigated the electrical conductivity and CTE of a large number of spinel materials, and the results showed that Co 3 O 4 , Cu x Mn 3– x O 4 , and Mn x Co 3– x O 4 (1 < x < 1.5) were the most suitable coating materials for the SOFC interconnects. Among them, the Co 3 O 4 spinel coating has a suitable CTE, excellent electrical conductivity and oxidation resistance, and the ability to prevent Cr volatilization. − Moreover, by combination with reactive elements or their oxides, the high-temperature oxidation resistance of the coating can be further improved and its life in SOFC stacks can be extended.…”