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    A composite oxygen-reduction electrode composed of SrSc 0.2Co0.8O3-d perovskite and Sm 0.2Ce0.8O1.9 for an intermediate-temperature solid-oxide fuel cell

    Access Status
    Fulltext not available
    Authors
    An, B.
    Zhou, W.
    Guo, Y.
    Ran, R.
    Shao, Zongping
    Date
    2010
    Type
    Journal Article
    
    Metadata
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    Citation
    An, B. and Zhou, W. and Guo, Y. and Ran, R. and Shao, Z. 2010. A composite oxygen-reduction electrode composed of SrSc 0.2Co0.8O3-d perovskite and Sm 0.2Ce0.8O1.9 for an intermediate-temperature solid-oxide fuel cell. International Journal of Hydrogen Energy. 35 (11): pp. 5601-5610.
    Source Title
    International Journal of Hydrogen Energy
    DOI
    10.1016/j.ijhydene.2010.03.044
    ISSN
    0360-3199
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/44201
    Collection
    • Curtin Research Publications
    Abstract

    SSC (70 wt.% SrSc0.2Co0.8O3-d)-SDC (30 wt.% Sm0.2Ce0.8O1.9) composite was evaluated as cathode for intermediate-temperature solid-oxide fuel cells. The effect of firing temperature on the chemical interaction between SSC and SDC was characterized by oxygen-temperature programmed desorption (O2-TPD) techniques. Certain type of phase reactions occurred between SSC and SDC at calcination temperatures higher than 950 °C. The conductivity of the composite was measured by a four-prober direct current technique. The electro-catalytic activity of the composite electrode for oxygen reduction was measured by electrochemical impedance spectroscopy (EIS) in a symmetric cell configuration. The electrode fired at 950 °C showed the best performance. By applying the SSC + SDC-composite electrode, a cell with a ~20-µm thick SDC electrolyte delivered a peak power density of 760 mW cm-2 at 600 °C. This suggested that an SSC + SDC-composite electrode may be a promising cathode for intermediate-temperature solid-oxide fuel cells. © 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.

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