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  • Hollow TiO2–X porous microspheres composed of well-crystalline nanocrystals for high-performance lithium-ion batteries

    Author(s)
    Wang, C
    Wang, F
    Zhao, Y
    Li, Y
    Yue, Q
    Liu, Y
    Liu, Y
    Elzatahry, AA
    Al-Enizi, A
    Wu, Y
    Deng, Y
    Zhao, D
    Griffith University Author(s)
    Zhao, Dongyuan
    Year published
    2016
    Metadata
    Show full item record
    Abstract
    Hollow TiO2–X porous microspheres consisted of numerous well-crystalline nanocrystals with superior structural integrity and robust hollow interior were synthesized by a facile sol-gel template-assisted approach and two-step carbonprotected calcination method, together with hydrogenation treatment. They exhibit a uniform diameter of ~470 nm with a thin porous wall shell of ~50 nm in thickness. The Brunauer-Emmett-Teller (BET) surface area and pore volume are ~19 m2/g and 0.07 cm3/g, respectively. These hollow TiO2–X porous microspheres demonstrated excellent lithium storage performance with stable capacity retention for over ...
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    Hollow TiO2–X porous microspheres consisted of numerous well-crystalline nanocrystals with superior structural integrity and robust hollow interior were synthesized by a facile sol-gel template-assisted approach and two-step carbonprotected calcination method, together with hydrogenation treatment. They exhibit a uniform diameter of ~470 nm with a thin porous wall shell of ~50 nm in thickness. The Brunauer-Emmett-Teller (BET) surface area and pore volume are ~19 m2/g and 0.07 cm3/g, respectively. These hollow TiO2–X porous microspheres demonstrated excellent lithium storage performance with stable capacity retention for over 300 cycles (a high capacity of 151 mAh/g can be obtained up to 300 cycles at 1 C, retaining 81.6% of the initial capacity of 185 mAh/g) and enhanced rate capability even up to 10 C (222, 192, 121, and 92.1 mAh/g at current rates of 0.5, 1, 5, and 10 C, respectively). The intrinsic increased conductivity of the hydrogenated TiO2 microspheres and their robust hollow structure beneficial for lithium ion-electron diffusion and mitigating the structural strain synergistically contribute to the remarkable improvements in their cycling stability and rate performance.
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    Journal Title
    Nano Research
    Volume
    9
    Issue
    1
    DOI
    https://doi.org/10.1007/s12274-015-0976-7
    Subject
    Nanotechnology
    Inorganic materials (incl. nanomaterials)
    Nanomaterials
    Crystallography
    Publication URI
    http://hdl.handle.net/10072/408313
    Collection
    • Journal articles

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