▎ 摘　　要

A CoSb3-nanocrystals/graphene nanocomposite was synthesized by a facile in situ one-pot solvothermal route. CoSb3 nanocrystals (around 10 nm) with a narrow size distribution were uniformly dispersed and supported by the graphene sheets, forming a unique hybrid nanostructure. The electrochemical Li-storage performance of the nanocomposite was investigated as a potential application in Li-ion batteries. The nanocomposite exhibits an obviously improved electrochemical performance compared to bare CoSb3. The enhancement of the electrochemical performance could be attributed to the introduction of the graphene that not only constructs a two-dimensional conductive network but also disperses and confines the CoSb3 nanoparticles. The electronic conductivity and ac impedance were measured to understand the underlying mechanism for the enhanced electrochemical performance.