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    A novel Ba0.6Sr0.4Co0.9Nb0.1O3-d cathode for protonic solid-oxide fuel cells

    Access Status
    Fulltext not available
    Authors
    Lin, Y.
    Ran, R.
    Chen, D.
    Shao, Zongping
    Date
    2010
    Type
    Journal Article
    
    Metadata
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    Citation
    Lin, Y. and Ran, R. and Chen, D. and Shao, Z. 2010. A novel Ba0.6Sr0.4Co0.9Nb0.1O3-d cathode for protonic solid-oxide fuel cells. Journal of Power Sources. 195 (15): pp. 4700-4703.
    Source Title
    Journal of Power Sources
    DOI
    10.1016/j.jpowsour.2010.02.062
    ISSN
    0378-7753
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/22314
    Collection
    • Curtin Research Publications
    Abstract

    Ba0.6Sr0.4Co0.9Nb0.1O3-d (BSCN), originated from SrCo0.9Nb0.1O3-d (SCN), is investigated as a cathode material in a protonic solid-oxide fuel cell (SOFC-H+) with a BaZr0.1Ce0.7Y0.2O3 (BZCY) electrolyte. The surface-exchange and bulk-diffusion properties, phase reaction with the electrolyte, electrochemical activity for oxygen reduction, and performance in the real fuel cell condition of SCN and BSCN electrodes are comparatively studied by conductivity relaxation, XRD, EIS and I-V polarization characterizations. Much better performance is found for BSCN than SCN. Furthermore, water has a positive effect on oxygen reduction over BSCN while it has the opposite effect with SCN. A peak power density of 630 mW cm-2 at 700 °C is achieved for a thin-film BZCY electrolyte cell with a BSCN cathode compared to only 287 mW cm-2 for a similar cell with an SCN cathode. The results highly recommend BSCN as a potential cathode material for protonic SOFCs. Crown Copyright © 2010.

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