SOFC performance with Fe-Cr-Mn alloy interconnect

S. P. Simner, M. D. Anderson, G. G. Xia, Z. Yang, L. R. Pederson, J. W. Stevenson

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    Abstract

    The performances of anode-supported solid oxide fuel cells (SOFCs) utilizing a Mn-containing ferritic stainless steel (Crofer22 APU) as the cathode current collector were assessed. Three cathodes were considered: (La 0.8Sr0.2)0.99MnO3, (La 0.8Sr0.2)0.99FeO3, and (La 0.6Sr0.4)0.98Fe0.8Co 0.2O3 (all samples incorporated a Sm-doped CeO2 interlayer between the cathode and the thin-film yttria-stablized zirconia electrolyte). Inclusion of the Fe-Cr alloy caused rapid degradation in all samples, which was attributed to solid-state reactivity at the cathode-Crofer interface, in addition to Cr volatilization from the alloy and subsequent condensation/ reaction within the cathode and at the cathode-electrolyte interface. In situ high-temperature X-ray diffraction was used to assess the cathode-Crofer reaction products. Preoxidation of the Crofer at 800°C for 500 h to form a protective (Mn,Cr)3O4 spinel coating resulted in a marginal reduction of the cell degradation rate.

    Original languageEnglish
    Pages (from-to)A740-A745
    JournalJournal of the Electrochemical Society
    Volume152
    Issue number4
    DOIs
    Publication statusPublished - 20 May 2005

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    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Renewable Energy, Sustainability and the Environment
    • Surfaces, Coatings and Films
    • Electrochemistry
    • Materials Chemistry

    Cite this

    Simner, S. P., Anderson, M. D., Xia, G. G., Yang, Z., Pederson, L. R., & Stevenson, J. W. (2005). SOFC performance with Fe-Cr-Mn alloy interconnect. Journal of the Electrochemical Society, 152(4), A740-A745. https://doi.org/10.1149/1.1864332