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    Optimising thermochemical energy storage: a comprehensive analysis of CaCO3 composites with CaSiO3, CaTiO3, and CaZrO3

    96685.pdf (1.459Mb)
    Access Status
    Open access
    Authors
    Humphries, Terry D.
    Vieira, Adriana P.
    Liu, Yurong
    McCabe, Eleanor
    Paskevicius, Mark
    Buckley, Craig E.
    Date
    2024
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Humphries, T.D. and Vieira, A.P. and Liu, Y. and McCabe, E. and Paskevicius, M. and Buckley, C.E. 2024. Optimising thermochemical energy storage: a comprehensive analysis of CaCO3 composites with CaSiO3, CaTiO3, and CaZrO3. Physical Chemistry Chemical Physics. 26 (29): pp. 19876-19886.
    Source Title
    Physical Chemistry Chemical Physics
    DOI
    10.1039/d4cp01144a
    ISSN
    1463-9076
    Faculty
    Centre for Aboriginal Studies
    Faculty of Science and Engineering
    School
    School of Elec Eng, Comp and Math Sci (EECMS)
    Centre for Aboriginal Studies
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DP200102301
    URI
    http://hdl.handle.net/20.500.11937/96921
    Collection
    • Curtin Research Publications
    Abstract

    With the increasing amount of renewable energy produced, many governments and industries are pushing for the installation of battery energy storage system (BESS) solutions. Thermal batteries are systems that store heat made from various energy sources, and can be used to produce electricity upon demand. These systems are easily scalable and can be installed in cities, homes and remote locations. Thermochemical energy storage (TCES) uses the enthalpy of a chemical reaction to store and release heat through endothermic and exothermic processes, respectively. CaCO3 has been identified as an ideal TCES material as it is cheap and abundant, but maximising long-term cyclability is key to ensure battery longevity. This article investigates the addition of CaSiO3, CaTiO3 and CaZrO3 to CaCO3 in a 1 : 1 ratio to ascertain the reaction properties and cyclic capacity over time. Cycling longevity and thermodynamic properties were determined using simultaneous differential scanning calorimetry and thermogravimetric analysis (DSC-TGA) along with the Sieverts technique, and their reaction pathway studied by powder X-ray diffraction (XRD) and scanning electron microscopy (SEM). The low cost of the CaCO3-CaSiO3 material of $1.8 USD per kW hth suggests that if a suitable particle refinement agent were to be employed to ensure cycling longevity this material would be an excellent TCES material. Despite the CO2 cycling capacity of the CaCO3-CaZrO3 system only reducing by 16 wt% over 100 cycles, the cost of ZrO2 brings the materials cost to $30.9 USD per kW hth, making this material currently unsuitable for application. The CaCO3-CaTiO3 system showed only a 17% drop in total CO2 uptake over 100 cycles, although the cost was $11.1 USD per kW hth

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