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    A new cathode for solid oxide fuel cells capable of in situ electrochemical regeneration

    Access Status
    Fulltext not available
    Authors
    Zhou, W.
    Shao, Zongping
    Liang, F.
    Chen, Z.
    Zhu, Z.
    Jin, W.
    Xu, N.
    Date
    2011
    Type
    Journal Article
    
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    Citation
    Zhou, W. and Shao, Z. and Liang, F. and Chen, Z. and Zhu, Z. and Jin, W. and Xu, N. 2011. A new cathode for solid oxide fuel cells capable of in situ electrochemical regeneration. Journal of Materials Chemistry. 21 (39): pp. 15343-15351.
    Source Title
    Journal of Materials Chemistry
    DOI
    10.1039/c1jm12660a
    ISSN
    0959-9428
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/5800
    Collection
    • Curtin Research Publications
    Abstract

    As highly efficient energy conversion devices with the capability for power/heat co-generation and fuel flexibility, solid-oxide fuel cells (SOFCs) have received considerable attention recently as a keystone of the future energy economy. Nowadays, lack of a proper cathode with high performance at intermediate temperature (IT) has become the main obstacle in realizing this fascinating technology. Here we present (La0.8Sr0.2) 0.95Ag0.05MnO3-d as a novel CO 2 tolerant cathode of IT-SOFCs, which shows silver intercalation/de-intercalation capability. Under cathodic polarization, silver can be extracted from perovskite lattice to form a 5-15 nm silver modified A-site cation deficient (La0.8Sr0.2) 0.95MnO3-d electrode with superior electrocatalytic activity and improved stability. Any performance degradation due to silver sintering can be easily in situ restored by re-intercalating silver into the perovskite lattice under anodic polarization. Through electrochemically adjusting the oxidation state and location of silver, we introduce a way for the development of high-performance silver-modified cathode for IT-SOFCs, which may contribute significantly to a sustainable future. © 2011 The Royal Society of Chemistry.

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