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    3D core–shell architecture from infiltration and beneficial reactive sintering as highly efficient and thermally stable oxygen reduction electrode

    Access Status
    Fulltext not available
    Authors
    Chen, D.
    Yang, G.
    Ciucci, F.
    Tade, Moses
    Shao, Zongping
    Date
    2014
    Type
    Journal Article
    
    Metadata
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    Citation
    Chen, D. and Yang, G. and Ciucci, F. and Tade, M. and Shao, Z. 2014. 3D core–shell architecture from infiltration and beneficial reactive sintering as highly efficient and thermally stable oxygen reduction electrode. Journal of Materials Chemistry A. 2: pp. 1284-1293.
    Source Title
    Journal of Materials Chemistry A
    DOI
    10.1039/c3ta13253f
    ISSN
    2050-7488
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/46324
    Collection
    • Curtin Research Publications
    Abstract

    Solid oxide fuel cells (SOFCs) as alternatives for energy conversion have the capacity to overcome low energy conversion efficiency, highly detrimental emissions from traditional fuel utilization and the limited reserves of fossil fuels crisis. Herein, a 3D core–shell architecture has been fabricated from solution infiltration in combination with high-temperature reactive sintering and evaluated as the oxygenreduction electrode for SOFCs. The resultant electrode is composed of a stable porous Sm0.2Ce0.8O1.9 scaffold as the core for bulk oxygen ion diffusion, and a connective Sm,Ce-doped SrCoO3-delta perovskite film as the shell for efficient oxygen reduction reaction and partial current collection. The significant enhancement in conductivity, chemical and thermal compatibility with such core–shell structured electrodes can deliver promising and stable power outputs. An anode-supported solid oxide fuel cell with such a core–shell structured cathode exhibits a peak power density of 1746 mW cm-2 at 750 degrees C, which is comparable to the most promising cathodes ever developed. In addition, both a symmetrical cell and a fuel cell demonstrate favourable short-term stability during 200 h operation at 700 degrees C. The combined strategy involving infiltration and high-temperature reactive sintering (accompanied by ion diffusion) appears to be a promising approach to fabricate cathodes with high electrochemical performance and stability.

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