US EPA

1256785 

Journal Article 

Nanostructured bilayered vanadium oxide electrodes for rechargeable sodium-ion batteries 

Tepavcevic, S; Xiong, H; Stamenkovic, VR; Zuo, X; Balasubramanian, M; Prakapenka, VB; Johnson, CS; Rajh, T 

2012 

1 

ACS Nano
ISSN: 1936-0851
EISSN: 1936-086X 

6 

1 

530-538 

English 

22148185 

10.1021/nn203869a 

WOS:000299368300064 

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(2)V(2)O(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. 

nanostructured electrodes; electrochemical deposition; bilayered V2O5; sodium-ion battery