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Two-dimensional heterostructures of VO and reduced graphene oxide as electrodes for high energy density asymmetric supercapacitors

Journal of Materials Chemistry A, ISSN: 2050-7496, Vol: 2, Issue: 40, Page: 17146-17152
2014
  • 196
    Citations
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  • 131
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Metrics Details

  • Citations
    196
    • Citation Indexes
      196
  • Captures
    131

Article Description

In this article, we report the synthesis of electrode materials based on two-dimensional (2D) heterostructures of VO nanosheets (VO NS) and reduced graphene oxide (rGO) electrodes for asymmetric supercapacitor applications. Specifically, the 2D VO and rGO/VO nanosheet electrodes showed a specific capacitance of 253 F g and 635 F g, respectively at a current density of 1 A g. The capacitance of the heterostructures is almost 2.5 times higher than the 2D VO nanosheets alone. The corresponding energy density of 39 Wh kg and 79.5 Wh kg were achieved for the two electrodes at a power density of 900 W kg in an asymmetric supercapacitor configuration. The energy and power density using the nanosheet heterostructure are, to our knowledge, higher than any of those that were previously reported for asymmetric supercapacitors using VO electrodes. This journal is

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