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 language | English (US) |
---|---|
Pages (from-to) | 530-538 |
Number of pages | 9 |
Journal | ACS nano |
Volume | 6 |
Issue number | 1 |
DOIs | |
State | Published - Jan 24 2012 |
Externally published | Yes |
Keywords
- bilayered V O
- electrochemical deposition
- nanostructured electrodes
- sodium-ion battery
ASJC Scopus subject areas
- General Materials Science
- General Engineering
- General Physics and Astronomy