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    Hierarchical carbon-coated acanthosphere-like Li4Ti5O12 microspheres for high-power lithium-ion batteries

    Access Status
    Fulltext not available
    Authors
    Sha, Y.
    Xu, X.
    Li, L.
    Cai, R.
    Shao, Zongping
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Sha, Y. and Xu, X. and Li, L. and Cai, R. and Shao, Z. 2016. Hierarchical carbon-coated acanthosphere-like Li4Ti5O12 microspheres for high-power lithium-ion batteries. Journal of Power Sources. 314: pp. 18-27.
    Source Title
    Journal of Power Sources
    DOI
    10.1016/j.jpowsour.2016.02.084
    ISSN
    0378-7753
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/33263
    Collection
    • Curtin Research Publications
    Abstract

    In this work, carbon-coated hierarchical acanthosphere-like Li4Ti5O12 microspheres (denoted as AM-LTO) were prepared via a two-step hydrothermal process with low-cost glucose as the organic carbon source. The hierarchical porous microspheres had open structures with diameters of 4-6 µm, which consisted of a bunch of willow leaf-like nanosheets. Each nanosheet was comprised of Li4Ti5O12 nanoparticles that are 20 nm in size and coated by a thin carbon layer. When applied as the anode material for lithium-ion batteries (LIBs), the AM-LTO presented outstanding rate and cycling performance due to its unique morphologies. A high capacity of 145.6 mAh g-1 was achieved for AM-LTO at a rate of 40C (1C = 175 mAh g-1). In contrast, the sample synthesized without glucose as carbon source (denoted as S-LTO) experienced an obvious structural collapse during the hydrothermal reaction and presented a specific capacity of only 67 mAh g-1 at 1C, which further decreased to 14 mAh g-1 at 40C. Further morphological growth of the acanthosphere-like Li4Ti5O12 microspheres and their excellent performance as an anode in LIBs were also discussed in this work.

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