La0.6Ba0.4CoO3 as a cathode material for solid oxide fuel cells using a BaCeO3 electrolyte

Michihisa Koyama, Ching Ju Wen, Koichi Yamada

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    45 Citations (Scopus)

    Abstract

    The cathodic reaction mechanism of a solid oxide fuel cell (SOFC) was investigated for an electrode-electrolyte system of La0.6Ba0.4CoO3 (LBC)-BaCeO3, under both the O2- conducting and H+/O2- mixed-ionic conducting conditions. AC impedance measurements were carried out, and the electrode interfacial conductivities were calculated. The experimental results revealed that the processes dominating the electrode resistance for the O2- conducting and the H+/O2- mixed-ionic conducting conditions are different. It was also found that the process dominating the electrode resistance changes at 700 °C under H+/O2- mixed-ionic conducting conditions. The process dominating the electrode resistance above 700 °C is postulated to be the reaction OLBC+HLBC→OHLBC. LBC showed high-performance cathode characteristics for a SOFC using BaCeO3 electrolyte.

    Original languageEnglish
    Pages (from-to)87-91
    Number of pages5
    JournalJournal of the Electrochemical Society
    Volume147
    Issue number1
    DOIs
    Publication statusPublished - Jan 1 2000

    All Science Journal Classification (ASJC) codes

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

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