Two-dimensional V2O5 sheet network as electrode for lithium-ion batteries

Yun Xu, Marco Dunwell, Ling Fei, Engang Fu, Qianglu Lin, Brian Patterson, Bin Yuan, Shuguang Deng, Paul Andersen, Hongmei Luo, Guifu Zou

Research output: Contribution to journalArticle

50 Scopus citations

Abstract

Two-dimensional V2O5 and manganese-doped V2O5 sheet network were synthesized by a one-step polymer-assisted chemical solution method and characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, thermal-gravimetric analysis, and galvanostatic discharge-charge analysis. The V2O5 particles were covered with thin carbon layers, which remained after decomposition of the polymer, forming a network-like sheet structure. This V2O5 network exhibits a high capacity of about 300 and 600 mA•h/g at a current density of 100 mA/g when it was used as a cathode and anode, respectively. After doping with 5% molar ratio of manganese, the capacity of the cathode increases from 99 to 165 mA•h/g at a current density of 1 A/g (∼3 C). This unique network structure provides an interconnected transportation pathway for lithium ions. Improvement of electrochemical performance after doping manganese could be attributed to the enhancement of electronic conductivity.

Original languageEnglish (US)
Pages (from-to)20408-20413
Number of pages6
JournalACS Applied Materials and Interfaces
Volume6
Issue number22
DOIs
StatePublished - Nov 26 2014
Externally publishedYes

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Keywords

  • Conductivity
  • Lithium-ion battery
  • Manganese-doped
  • Polymer-assisted solution method
  • VO network

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Xu, Y., Dunwell, M., Fei, L., Fu, E., Lin, Q., Patterson, B., Yuan, B., Deng, S., Andersen, P., Luo, H., & Zou, G. (2014). Two-dimensional V2O5 sheet network as electrode for lithium-ion batteries. ACS Applied Materials and Interfaces, 6(22), 20408-20413. https://doi.org/10.1021/am505975n