In Situ Synthesis of CoSb₃-Nanocrystals/Graphene Hybrid Via One-Pot Solvothermal Route and its Electrochemical Li-Storage Properties

摘要

A CoSb3-nanocrystals/graphene nanocomposite was synthesized by a facile in situ one-potsolvothermal route. CoSb3 nanocrystals (around 10 nm) with a narrow size distribution were uniformlydispersed and supported by the graphene sheets, forming a unique hybrid nanostructure. Theelectrochemical Li-storage performance of the nanocomposite was investigated as a potentialapplication in Li-ion batteries. The nanocomposite exhibits an obviously improved electrochemicalperformance compared to bare CoSb3. The enhancement of the electrochemical performance could beattributed to the introduction of the graphene that not only constructs a two-dimensional conductivenetwork but also disperses and confines the CoSb3 nanoparticles. The electronic conductivity and acimpedance were measured to understand the underlying mechanism for the enhanced electrochemicalperformance.