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Issue 11, 2011
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Reduced graphene oxide supported highly porous V2O5 spheres as a high-power cathode material for lithium ion batteries

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Abstract

Reduced graphene oxide (rGO) supported highly porous polycrystalline V2O5 spheres (V2O5/rGO) were prepared by using a solvothermal approach followed by an annealing process. Initially, reduced vanadium oxide (rVO) nanoparticles with sizes in the range of 10–50 nm were formed through heterogeneous nucleation on rGO sheets during the solvothermal process. These rVO nanoparticles were oxidized to V2O5 after the annealing process in air at 350 °C and assembled into polycrystalline porous spheres with sizes of 200–800 nm. The weight ratio between the rGO and V2O5 is tunable by changing the weight ratio of the precursors, which in turn affects the morphology of V2O5/rGO composites. The V2O5/rGO composites display superior cathode performances with highly reversible specific capacities, good cycling stabilities and excellent rate capabilities (e.g. 102 mA h g−1 at 19 C).

Graphical abstract: Reduced graphene oxide supported highly porous V2O5 spheres as a high-power cathode material for lithium ion batteries

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Publication details

The article was received on 20 Jul 2011, accepted on 04 Sep 2011 and first published on 11 Oct 2011


Article type: Paper
DOI: 10.1039/C1NR10879D
Citation: Nanoscale, 2011,3, 4752-4758
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    Reduced graphene oxide supported highly porous V2O5 spheres as a high-power cathode material for lithium ion batteries

    X. Rui, J. Zhu, D. Sim, C. Xu, Y. Zeng, H. H. Hng, T. M. Lim and Q. Yan, Nanoscale, 2011, 3, 4752
    DOI: 10.1039/C1NR10879D

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