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    Porous TiO2(B)/anatase microspheres with hierarchical nano and microstructures for high-performance lithium-ion batteries

    Access Status
    Fulltext not available
    Authors
    Wang, J.
    Zhou, Y.
    Shao, Zongping
    Date
    2013
    Type
    Journal Article
    
    Metadata
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    Citation
    Wang, J. and Zhou, Y. and Shao, Z. 2013. Porous TiO2(B)/anatase microspheres with hierarchical nano and microstructures for high-performance lithium-ion batteries. Electrochimica Acta. 97: pp. 386-392.
    Source Title
    Electrochimica Acta
    DOI
    10.1016/j.electacta.2013.03.015
    ISSN
    0013-4686
    URI
    http://hdl.handle.net/20.500.11937/31361
    Collection
    • Curtin Research Publications
    Abstract

    Novel hierarchical porous TiO2(B)/anatase microspheres have been prepared by a facile solvothermal approach and evaluated as anode materials for advanced lithium-ion battery applications. The obtained porous microspheres, with diameters ranging from 2.5 to 5.5 micrometers, are assembled by porous TiO2 nanosheets with the lateral size of a few micrometers and thickness of ~13 nm; whilst, the nanosheets are formed by aggregations of nanosized primary TiO2 crystallites (~5–7 nm). The hierarchical porous structures are verified by BET test results with a typical type-IV isotherm curve, a high surface area (~186.2 m2 g-1) and two kinds of pores (~4 and 8.3 nm). The hierarchical porous TiO2 microspheres present excellent electrochemical performance with high Li storage capacity and excellent high-rate cycling capability (a specific capacity of 117 mAh g-1 at the rate of 4000 mA g-1 after 4500 cycles), which might be attributed to the enhanced Li+ diffusion and electronic conductivity induced by the hierarchical microstructures, the TiO2(B)/anatase heterojunction, and the pseudocapacitance of TiO2(B). Such hierarchical porous materials might be promising for applications in advanced power type lithium-ion batteries.

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