▎ 摘　　要

In this work, a unique nanocomposite of zinc-cobalt bimetallic sulfide and reduced graphene oxide (Zn0.76Co0.24S@rGO) is synthesized by a simple water bath-hydrothermal-sulfurization-annealing process. The designed nanomaterials have high theoretical capacity and excellent electrical conductivity of sulfide as well as excellent mechanical stability of reduced graphene oxide. When evaluated as the anode material for LIB, Zn0.76Co0.24S@rGO nanomaterial shows a high reversible capacity of 989 mAh g(-1) at a current density of 100 mA g(-1) after 100 cycles. The significant improvement in the electrochemical performance of Zn0.76Co0.24S@rGO nanocomposite anode can be attributed to the strong synergy between Zn0.76Co0.24S and reduced graphene oxide nanosheets, and the phase transition or alloying reaction of metal sulfides provides a higher theoretical capacity during lithium ion storage.