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. CeO₂ is uniformly distributed in the spinel and NiO layers. The synergistic effects originating from nanostructured CeO₂ and NiO not only reduce the growth rate of Cr₂O₃ and suppress the outward diffusion of Cr, but also improve the electrical performance of the surface scale. [ABSTRACT FROM AUTHOR]