Nanostructured bilayered vanadium oxide electrodes for rechargeable sodium-ion batteries

Sanja Tepavcevic, Hui Xiong, Vojislav R. Stamenkovic, Xiaobing Zuo, Mahalingam Balasubramanian, Vitali B. Prakapenka, Christopher S. Johnson, Tijana Rajh

Research output: Contribution to journalArticlepeer-review

274 Scopus citations

Abstract

Figure Persented: Tailoring nanoarchitecture of materials offers unprecedented opportunities in utilization of their functional properties. Nanostructures of vanadium oxide, synthesized by electrochemical deposition, are studied as a cathode material for rechargeable Na-ion batteries. Ex situ and in situ synchrotron characterizations revealed the presence of an electrochemically responsive bilayered structure with adjustable intralayer spacing that accommodates intercalation of Na + ions. Sodium intake induces organization of overall structure with appearance of both long- and short-range order, while deintercalation is accompanied with the loss of long-range order, whereas short-range order is preserved. Nanostructured electrodes achieve theoretical reversible capacity for Na 2V 2O 5 stochiometry of 250 mAh/g. The stability evaluation during charge-discharge cycles at room temperature revealed an efficient 3 V cathode material with superb performance: energy density of ∼760 Wh/kg and power density of 1200 W/kg. These results demonstrate feasibility of development of the ambient temperature Na-ion rechargeable batteries by employment of electrodes with tailored nanoarchitectures.

Original languageEnglish (US)
Pages (from-to)530-538
Number of pages9
JournalACS nano
Volume6
Issue number1
DOIs
StatePublished - Jan 24 2012
Externally publishedYes

Keywords

  • bilayered V O
  • electrochemical deposition
  • nanostructured electrodes
  • sodium-ion battery

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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