Characterisation of the Ni/ScYSZ interface in a model solid oxide fuel cell anode

Michael Stenbæk Schmidt, Karin Vels Hansen, Kion Norrman, Mogens Bjerg Mogensen

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    A nickel point electrode setup was used as a model of an SOFC anode on three slightly different electrolytes of zirconia stabilised by co-doping with scandia and yttria. The effect of electrolyte impurities on the electrode polarisation resistance was investigated by correlating electrochemical impedance spectroscopy data with time-of-flight secondary ion mass spectrometry, scanning electron microscopy and atomic force microscopy data. A semi-quantitative analysis of the electrolyte surfaces showed that the levels of surface impurities inside the electrode/electrolyte interface in close proximity to the three phase boundary have a large effect on the electrode polarisation resistance.
    Original languageEnglish
    JournalSolid State Ionics
    Volume179
    Issue number39
    Pages (from-to)2290-2298
    ISSN0167-2738
    DOIs
    Publication statusPublished - 2008

    Keywords

    • Segregation of impurities
    • Solid oxide fuel cell
    • Ni
    • ScYSZ
    • ToF-SIMS
    • Anode

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