Ultra-long VO$lt;inf$gt;2$lt;/inf$gt;(B) Nanobelts : One-step Hydrothermal Synthesis and Electrochemical Properties

Ultra-long VO 2 (B) nanobelts were fabricated by a facile one-step hydrothermal treatment. It was found that the nanobelts were about ~200 nm in width and dozens of microns in length. Being used as a cathode material, the VO 2 (B) nanobelts show superior rate capability, with discharge capacities of ca. 425, 175, 125, 90, 75 and 50 mAh/g at 50, 100, 200, 500, 1000 and 2000 mA/g, respectively. More importantly, excellent cycling stability without considerable capacity loss (10.41%) for 500 cycles is observed. The present study implied that the unique ultra-long nanobelts morphology and its intrinsic structural features are responsible for their excellent structure stability, and thus resulting in superior electrochemical performance.