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    Novel cathode-supported hollow fibers for light weight micro-tubular solid oxide fuel cells with an active cathode functional layer

    Access Status
    Fulltext not available
    Authors
    Meng, X.
    Yang, N.
    Gong, X.
    Yin, Y.
    Ma, Z.
    Tan, X.
    Shao, Zongping
    Liu, Shaomin
    Date
    2014
    Type
    Journal Article
    
    Metadata
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    Citation
    Meng, X. and Yang, N. and Gong, X. and Yin, Y. and Ma, Z. and Tan, X. and Shao, Z. et al. 2014. Novel cathode-supported hollow fibers for light weight micro-tubular solid oxide fuel cells with an active cathode functional layer. Journal of Materials Chemistry A. 3 (3): pp. 1017-1022.
    Source Title
    Journal of Materials Chemistry A
    DOI
    10.1039/c4ta04635h
    ISSN
    2050-7488
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/42424
    Collection
    • Curtin Research Publications
    Abstract

    Micro-tubular SOFCs have the potential to become light-weight portable auxiliary power units for aircraft or spacecraft. In this work, a novel dual-layer ceramic hollow fiber for a cathode-supported micro-tubular solid oxide fuel cell (MT-SOFC) has been successfully developed via a co-spinning-sintering technique. The green cathode hollow fibers, in dual layer configuration, consisting of a La0.8Sr0.2MnO3-d (LSM) main layer and a LSM-Y2O3 stabilized ZrO2 (YSZ) functional layer with increased three phase boundary length, are first prepared by co-spinning, which are then sintered at around 1350°C to allow the creation of sufficient mechanical strength. Other cell components like the electrolyte (YSZ) and anode (NiO + YSZ) are then coated separately. The coated electrolyte film with a thickness of around 27 µm is obtained by co-sintering of YSZ/LSM-YSZ/LSM in a sandwich structure. The porous LSM substrate functions as an oxygen-supplying and current collecting layer. The prepared MT-SOFC, tested with hydrogen as the fuel and air as the oxidant, delivers a maximum power density of up to 475 mW cm-2 at 850°C, which is much higher than that of a similar cell without a cathode functional layer.

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