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    Physicochemical Characterization of a Na-H-F Thermal Battery Material

    82297.pdf (1.116Mb)
    Access Status
    Open access
    Authors
    Humphries, Terry
    Rawal, A.
    Rowles, Matthew
    Prause, C.R.
    Bird, Julianne
    Paskevicius, Mark
    Sofianos, M. Veronica
    Buckley, Craig
    Date
    2020
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Humphries, T.D. and Rawal, A. and Rowles, M.R. and Prause, C.R. and Bird, J.E. and Paskevicius, M. and Sofianos, M.V. et al. 2020. Physicochemical Characterization of a Na-H-F Thermal Battery Material. Journal of Physical Chemistry C. 124 (9): pp. 5053-5060.
    Source Title
    Journal of Physical Chemistry C
    DOI
    10.1021/acs.jpcc.9b10934
    ISSN
    1932-7447
    Faculty
    Faculty of Science and Engineering
    School
    John de Laeter Centre (JdLC)
    School of Electrical Engineering, Computing and Mathematical Sciences (EECMS)
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/LP120101848
    http://purl.org/au-research/grants/arc/LP150100730
    http://purl.org/au-research/grants/arc/FT160100303
    Remarks

    This document is the Accepted Manuscript version of a Published Work that appeared in final form in Physicochemical Characterization of a Na-H-F Thermal Battery Material, copyright © American Chemical Society, after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.jpcc.9b10934

    URI
    http://hdl.handle.net/20.500.11937/82255
    Collection
    • Curtin Research Publications
    Abstract

    Copyright © 2020 American Chemical Society. Fluorine-substituted sodium hydride is investigated for application as a thermal energy storage material inside thermal batteries. A range of compositions of NaHxF1-x (x = 0, 0.5, 0.7, 0.85, 0.95, 1) have been studied using synchrotron radiation powder X-ray diffraction (SR-XRD), near-edge X-ray absorption fine structure spectroscopy (NEXAFS), and nuclear magnetic resonance spectroscopy (NMR), with the thermal conductivity and melting points also being determined. SR-XRD and NMR spectroscopy studies identified that the solid solutions formed during synthesis contain multiple phases rather than a single stoichiometric compound, despite the materials exhibiting a single melting point. As the fluorine content of the materials increases, the Na-H(F) bond length decreases, increasing the stability of the compound. This trend is also observed during melting point analysis where increasing the fluorine content increases the melting point of the material; that is, x < 0.3 (i.e., F- > 0.7) enables melting at temperatures above 750 °C.

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