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Facile and Low-Cost Synthesis of Large-Area Pure V2O5 Nanosheets for High-Capacity and High-Rate Lithium Storage over a Wide Temperature Range

Authors

  • Dr. Zhong-li Wang,

    1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 (P. R. China)
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  • Dr. Dan Xu,

    1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 (P. R. China)
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  • Prof. Li-min Wang,

    1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 (P. R. China)
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  • Prof. Dr. Xin-bo Zhang

    Corresponding author
    1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 (P. R. China)
    • State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 (P. R. China)
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Abstract

One of the great challenges in the development of next-generation lithium ion batteries is to simultaneously achieve high power and large energy capacity. Herein, large-area pure V2O5 nanosheets are successfully synthesized by a novel and facile dissolution–splitting method using low-cost raw materials. The as-prepared product exhibits enhanced lithium storage properties including high reversible capacity (290 mAh g−1), good cycling and rate performance (144 mAh g−1 at 10 C and 95 mAh g−1 at 20 C), which can deliver a high power density of 15.6 kW kg−1 while the energy density remains as high as 260 Wh kg−1. At low temperatures of 0 and −20 oC, the V2O5 nanosheets can still deliver high capacities of 184 and 158 mAh g−1 at 1 C, respectively, and also exhibit excellent cycling stability.

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