Spinel-based coatings for metal supported solid oxide fuel cells

Stefan, Elena and Neagu, Dragos and Blennow Tullmar, Peter and Persson, Åsa Helen and Sudireddy, Bhaskar R. and Miller, David and Chen, Ming and Irvine, John (2017) Spinel-based coatings for metal supported solid oxide fuel cells. Materials Research Bulletin, 89. pp. 232-244. ISSN 0025-5408 (https://doi.org/10.1016/j.materresbull.2017.02.003)

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Abstract

Metal supports and metal supported half cells developed at DTU are used for the study of a solution infiltration approach to form protective coatings on porous metal scaffolds. The metal particles in the anode layer, and sometimes even in the support may undergo oxidation in realistic operating conditions leading to severe cell degradation. Here, a controlled oxidation of the porous metal substrate and infiltration of Mn and/or Ce nitrate solutions are applied for in situ formation of protective coatings. Our approach consists of scavenging the FeCr oxides formed during the controlled oxidation into a continuous and well adhered coating. The effectiveness of coatings is the result of composition and structure, but also of the microstructure and surface characteristics of the metal scaffolds.

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