Oxidation and electrical properties of nanostructured CeO2–Ni coating on solid oxide fuel cell interconnects

A nanostructured CeO2–Ni coating is prepared on a steel substrate via two-step electrodeposition. An oxide scale with a multi-layer structure of Cr2O3–(Mn,Cr)3O4–(Ni,Mn,Cr)3O4–NiO has developed on the coated steel after 1680 h of oxidation in air at 800 °C. CeO2is uniformly distributed in the spinel and NiO layers. The synergistic effects originating from nanostructured CeO2and NiO not only reduce the growth rate of Cr2O3and suppress the outward diffusion of Cr, but also improve the electrical performance of the surface scale.