Fabrication of VO2(B) Nanobelts and Their Application in Lithium Ion Batteries

Abstract

VO2(B) nanobelts have been successfully synthesized via a simple hydrothermal route. The products were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and Raman spectrum. These nanobelts are of rectangular cross-section with mean length about 1 μm, mean width about 80 nm, and mean thickness about 50 nm. The as-synthesized VO2nanobelts were assembled as the cathode electrodes of lithium ion batteries. Their electrochemical properties were studied by conventional charge/discharge tests, which show an initial discharge capacity of 321 mAh g−1with voltage plateau near 2.5 V. These results indicated that such hydrothermally synthesized VO2(B) nanobelts could be an ideal candidate of cathode material for lithium ion battery.