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Nanostructured Bilayered Vanadium Oxide Electrodes for Rechargeable Sodium-Ion Batteries
ACS Nano (2012)
  • Hui Xiong, Argonne National Laboratory
Abstract

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 Na2V2O5 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.

Keywords
  • nanostructured electrodes,
  • electrochemical deposition,
  • bilayered V2O5,
  • sodium-ion battery
Publication Date
January 24, 2012
Publisher Statement
Please refer to the article for a complete list of authors.
Citation Information
Hui Xiong. "Nanostructured Bilayered Vanadium Oxide Electrodes for Rechargeable Sodium-Ion Batteries" ACS Nano Vol. 6 Iss. 1 (2012)
Available at: http://works.bepress.com/hui_xiong/5/