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    Evaluation of Ba0.5Sr0.5Co0.8Fe0.2O3-d as a potential cathode for an anode-supported proton-conducting solid-oxide fuel cell

    Access Status
    Fulltext not available
    Authors
    Lin, Y.
    Ran, R.
    Zheng, Y.
    Shao, Zongping
    Jin, W.
    Xu, N.
    Ahn, J.
    Date
    2008
    Type
    Journal Article
    
    Metadata
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    Citation
    Lin, Y. and Ran, R. and Zheng, Y. and Shao, Z. and Jin, W. and Xu, N. and Ahn, J. 2008. Evaluation of Ba0.5Sr0.5Co0.8Fe0.2O3-d as a potential cathode for an anode-supported proton-conducting solid-oxide fuel cell. Journal of Power Sources. 180 (1): pp. 15-22.
    Source Title
    Journal of Power Sources
    DOI
    10.1016/j.jpowsour.2008.02.044
    ISSN
    0378-7753
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/30512
    Collection
    • Curtin Research Publications
    Abstract

    The potential application of Ba0.5Sr0.5Co0.8Fe0.2O3-d (BSCF) as a cathode for a proton-conducting solid-oxide fuel cell based on BaCe0.9Y0.1O2.95 (BCY) electrolyte was investigated. Cation diffusion from BCY to BSCF with the formation of a perovskite-type Ba2+-enriched BSCF and a Ba2+-deficient BCY at a firing temperature as low as 900 °C was observed, the higher the firing temperature the larger deviation of the A to B ratio from unit for the perovskites. Symmetric cell tests demonstrated the impurity phases did not induce a significant change of the cathodic polarization resistance, however, the ohmic resistance of the cell increased obviously. Anode-supported cells with the electrolyte thickness of ~50 µm were successfully fabricated via a dual-dry pressing process for the single-cell test. Under optimized conditions, a maximum peak power density of ~550 and 100 mW cm-2 was achieved at 700 and 400 °C, respectively, for the cell with the BSCF cathode layer fired from 950 °C. At 500 °C, the ohmic resistance is still the main source of cell resistance. A further reduction in membrane thickness would envisage an increase in power density significantly. © 2008 Elsevier B.V. All rights reserved.

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