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In-situ hydrothermal synthesis of graphene woven vo2 nanoribbons with improved cycling performance

Journal Article


Abstract


  • To overcome the problems of vanadium dissolution and the higher charge transfer resistance that results

    from it, VO2/graphene composite has been synthesized by an in-situ hydrothermal process directly from

    graphene oxide and V2O5, and characterized by X-ray diffraction, Raman spectroscopy, FT-IR spectroscopy,

    thermogravimetric analysis, atomic force microscope, and field emission scanning electron microscopy.

    Electrochemical tests showthat theVO2/graphene composite features high discharge capacity (380mAhg1)

    and 99% capacity retention after 50 cycles. It has very lowresistance, only 67% of that of pure VO2, indicating

    the enhancement of electronic conductivity. Carbon dispersed in the electrode material can provide

    a pathway for electron transport, resulting in improvement of the electronic conductivity. Graphene woven

    VO2 nanoribbons prevent the agglomeration of VO2 nanoribbons, meanwhile graphene and the VO2 nanoribbons

    together form a porous network in the random hybrid composite that can be filled with electrolyte,

    resulting in superior performance and enhanced reversible capacity in comparison with the pure VO2. Thus,

    this work provides a facile route to synthesize VO2/graphene composite which shows excellent electrochemical

    performance and is a potential material for lithium ion battery.

Publication Date


  • 2013

Citation


  • Shi, Y., Chou, S., Wang, J., Li, H., Liu, H. K. & Wu, Y. (2013). In-situ hydrothermal synthesis of graphene woven vo2 nanoribbons with improved cycling performance. Journal of Power Sources, 244 684-689.

Scopus Eid


  • 2-s2.0-84886402851

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/777

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 684

End Page


  • 689

Volume


  • 244

Place Of Publication


  • Switzerland

Abstract


  • To overcome the problems of vanadium dissolution and the higher charge transfer resistance that results

    from it, VO2/graphene composite has been synthesized by an in-situ hydrothermal process directly from

    graphene oxide and V2O5, and characterized by X-ray diffraction, Raman spectroscopy, FT-IR spectroscopy,

    thermogravimetric analysis, atomic force microscope, and field emission scanning electron microscopy.

    Electrochemical tests showthat theVO2/graphene composite features high discharge capacity (380mAhg1)

    and 99% capacity retention after 50 cycles. It has very lowresistance, only 67% of that of pure VO2, indicating

    the enhancement of electronic conductivity. Carbon dispersed in the electrode material can provide

    a pathway for electron transport, resulting in improvement of the electronic conductivity. Graphene woven

    VO2 nanoribbons prevent the agglomeration of VO2 nanoribbons, meanwhile graphene and the VO2 nanoribbons

    together form a porous network in the random hybrid composite that can be filled with electrolyte,

    resulting in superior performance and enhanced reversible capacity in comparison with the pure VO2. Thus,

    this work provides a facile route to synthesize VO2/graphene composite which shows excellent electrochemical

    performance and is a potential material for lithium ion battery.

Publication Date


  • 2013

Citation


  • Shi, Y., Chou, S., Wang, J., Li, H., Liu, H. K. & Wu, Y. (2013). In-situ hydrothermal synthesis of graphene woven vo2 nanoribbons with improved cycling performance. Journal of Power Sources, 244 684-689.

Scopus Eid


  • 2-s2.0-84886402851

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/777

Has Global Citation Frequency


Number Of Pages


  • 5

Start Page


  • 684

End Page


  • 689

Volume


  • 244

Place Of Publication


  • Switzerland