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    Effect of Gd2O3 doping on structure and boron volatility of borosilicate glass sealants in solid oxide fuel cells—A study on the La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) cathode

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    Authors
    Zhang, Q.
    Tan, S.
    Ren, M.
    Yang, H.
    Tang, D.
    Chen, K.
    Zhang, T.
    Jiang, San Ping
    Date
    2018
    Type
    Journal Article
    
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    Citation
    Zhang, Q. and Tan, S. and Ren, M. and Yang, H. and Tang, D. and Chen, K. and Zhang, T. et al. 2018. Effect of Gd2O3 doping on structure and boron volatility of borosilicate glass sealants in solid oxide fuel cells—A study on the La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) cathode. Journal of Power Sources. 383: pp. 34-41.
    Source Title
    Journal of Power Sources
    DOI
    10.1016/j.jpowsour.2018.02.057
    ISSN
    0378-7753
    School
    Fuels and Energy Technology Institute
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DP150102025
    http://purl.org/au-research/grants/arc/DP150102044
    URI
    http://hdl.handle.net/20.500.11937/67613
    Collection
    • Curtin Research Publications
    Abstract

    Boron volatility is one of the most important properties of borosilicate-based glass sealants in solid oxide fuel cells (SOFCs), as boron contaminants react with lanthanum-containing cathodes, forming LaBO3 and degrading the activity of SOFCs. Here, we report that the reaction between the volatile boron and a La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) cathode during polarization can be significantly reduced by doping aluminoborosilicate glass with Gd2O3. Specifically, the Gd cations in glass with 2 mol.% Gd2O3 dissolve preferentially in the borate-rich environment to form more Gd-metaborate structures and promote the formation of calcium metaborate (CaB2O4); they also condense the B–O network after heat treatment, which suppresses poisoning by boron contaminants on the LSCF cathode. The results provide insights into design and development of a reliable sealing glass for SOFC applications.

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    • Effects of Nb2O5 and Gd2O3 doping on boron volatility and activity between glass seals and lanthanum-containing cathode
      Zhang, Q.; Chen, Kongfa; Tang, D.; Zhang, T.; Jiang, San Ping (2017)
      In planar Solid Oxide Fuel Cells (SOFCs), the boron species volatilize from glass seals, and react with lanthanum-containing cathodes (i.e., La0.6Sr0.4Co0.2Fe0.8O3 - d, LSCF) to form LaBO3 under cathodic polarization, ...
    • A Fundamental Study of Boron Deposition and Poisoning of La0.8Sr0.2MnO3 Cathode of Solid Oxide Fuel Cells under Accelerated Conditions
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      Borosilicate glass and glass-ceramics are the most common sealant materials for planar solid oxide fuel cells (SOFCs). This study focuses on the fundamentals of deposition and poisoning of volatile boron species from the ...
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