Solvothermal synthesis of V2O5/graphene nanocomposites for high performance lithium ion batteries

Da Chen, Ran Yi, Shuru Chen, Terrence Xu, Mikhail L. Gordin, Dongping Lv, Donghai Wang

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

In this work, V2O5/graphene nanocomposites have been synthesized by a facile solvothermal approach. The V2O5 nanoparticles, around 20-40 nm in size, were encapsulated in the 2D graphene matrix. The reversible Li-cycling properties of V2O 5/graphene have been evaluated by galvanostatic discharge-charge cycling, cyclic voltammetry, and impedance spectroscopy. Compared with the bare V2O5 nanoparticles, the V2O5/ graphene nanocomposites exhibited enhanced electrochemical performance with higher reversible capacity and improved cycling stability and rate capability. The graphene nanosheets act not only as an electronically conductive matrix to improve the electronic and ionic conductivity of the composite electrode, but also as a flexible buffer matrix to maintain the structural integrity of the composite electrodes by preventing particle agglomeration, thus leading to the improvement of the electrochemical performance of V2O5.

Original languageEnglish (US)
Pages (from-to)7-12
Number of pages6
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume185
Issue number1
DOIs
StatePublished - Jul 2014

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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