▎ 摘　　要

Owing to low-electronic conductivity and long lithium ion diffusion path of NH4V3O8 limit its application for lithium-ion batteries (LIBs). To overcome these limitation, a new nano-composites material of NH4V3O8-based have been successfully fabricated by a facial and environmental friendly approach, without the addition of any other template or surfactant. A facile hydrothermal route is employed to synthesised the reduced graphene oxide(rGO)/NH4V3O8 composites. Results show that the NH4V3O8 nano-belt are well distributed on the surface of rGO nanosheets. The resulted rGO/NH4V3O8 nanocomposites exhibit a high capacity as a cathode material for LIBs in comparison with the bare NH4V3O8. When used as cathode material for LIBs, it delivers a maximum discharge capacity of 253 mAhg(-1) at 15 mAg(-1), 70 mAhg(-1) larger than that of the pristine one. The enhanced electrochemical performance is attributed to the synergetic effects between NH4V3O8 and rGO, such as increased conductivity and shortened lithium ion diffusion path.