VO2 (A)/graphene nanostructure: Stand up to Na ion intercalation/deintercalation for enhanced electrochemical performance as a Na-ion battery cathode

Xinyuan Hu, Zhengjing Zhao, Lin Wang, Jingbo Li*, Chengzhi Wang, Yongjie Zhao, Haibo Jin

*Corresponding author for this work

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Abstract

Intercalation/deintercalation of large size Na ion leads to serious electrode materials fragmentation that would be the main reason of Na-ion battery capacity fading. Herein, we reported a Na-ion battery cathode material composed of layer-structured VO2 (A) nanowires wrapped with graphene. The VO2 (A)/graphene nanostructure which effectively suppressed pulverization of VO2 (A) nanowires during cyclic charging and discharging exhibited prominent cycle stability and high specific capacity. A reversible capacity of 115 mA h g−1 was retained over 100 cycles at a high current density of 100 mA g−1. Comparing to the electrochemical performance of other vanadium oxides, VO2 (A)/graphene demonstrates a potential cathode material for Na-ion batteries.

Original languageEnglish
Pages (from-to)97-104
Number of pages8
JournalElectrochimica Acta
Volume293
DOIs
Publication statusPublished - 10 Jan 2019

Keywords

  • Battery cathode material
  • Cycle stability
  • Na-ion battery
  • VO (A) nanowire
  • VO (A)/graphene composite

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Hu, X., Zhao, Z., Wang, L., Li, J., Wang, C., Zhao, Y., & Jin, H. (2019). VO2 (A)/graphene nanostructure: Stand up to Na ion intercalation/deintercalation for enhanced electrochemical performance as a Na-ion battery cathode. Electrochimica Acta, 293, 97-104. https://doi.org/10.1016/j.electacta.2018.10.010