Solid Oxide Electrolysis Cells: Degradation at High Current Densities

Ruth Knibbe, Marie Lund Traulsen, Anne Hauch, Sune Ebbesen, Mogens Bjerg Mogensen

    Research output: Contribution to journalJournal articleResearchpeer-review


    The degradation of Ni/yttria-stabilized zirconia (YSZ)-based solid oxide electrolysis cells operated at high current densities was studied. The degradation was examined at 850°C, at current densities of −1.0, −1.5, and −2.0 A/cm2, with a 50:50 (H2O:H2) gas supplied to the Ni/YSZ hydrogen electrode and oxygen supplied to the lanthanum, strontium manganite (LSM)/YSZ oxygen electrode. Electrode polarization resistance degradation is not directly related to the applied current density but rather a consequence of adsorbed impurities in the Ni/YSZ hydrogen electrode. However, the ohmic resistance degradation increases with applied current density. The ohmic resistance degradation is attributed to oxygen formation in the YSZ electrolyte grain boundaries near the oxygen electrode/electrolyte interface. ©2010 The Electrochemical Society
    Original languageEnglish
    JournalJournal of The Electrochemical Society
    Issue number8
    Pages (from-to)B1209-B1217
    Publication statusPublished - 2010


    • Fuel Cells and hydrogen
    • Electrolysis


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