▎ 摘　　要

Graphene/vanadium oxide nanocomposite (G/V2O5) monolith is prepared via a simple hydrothermal process. Owing to the intimate contact between the V2O5 nanobelts and graphene nanosheets in the monolith, the nanocomposite shows excellent electric conductivity, and therefore makes the electrod-eelectrolyte contact better and Li+ diffusion faster. A high specific capacitance of 163 F g(-1) has been achieved for G/V2O5 electrode in 0.5 mol L-1 K2SO4 solution. The G/V2O5 nanocomposite exhibits excellent cyclic performance with nearly 80% capacity retention at a current density of 5 A g(-1) in a testing range of 1000 cycles. Moreover, G/V2O5 nanocomposite exhibits excellent discharge properties and cycle stability as an anode material for lithium ion batteries. The initial capacity is 1100 mAh g(-1) and the reversible capacity of 530 mAh g(-1) is maintained after 100 cycles at a current density of 50 mAg(-1). (C) 2015 Elsevier Ltd. All rights reserved.