Effect of graphene oxide concentration on the electrochemical properties of reduced graphene oxide/ZnS
Reduced graphene oxide/ZnS(rGO/ZnS)composites were successfully prepared by hydrothermal method using graphene oxide(GO),zinc acetate(Zn(CH3COO)2),and thiourea as raw materials.The microstructure and mor-phology of the sample were characterized by X-ray diffraction(XRD)and scanning electron microscopy(SEM),etc.The material was used as anodes for lithium-ion batteries,and electrochemical test results demonstrated that the as-prepared rGO/ZnS composite exhibited significantly enhanced electrochemical lithium storage performance in comparison to rGO.The highly conductive rGO can provide an efficient path for the transport of lithium ions and electrons,and ZnS can provide a high theoretical specific capacity.The rGO/ZnS composites exhibited good lithium intercalation capacity and cycling performance under the synergistic effect of rGO and nanoscale highly dispersed spherical ZnS particles.When the GO mass concentration was 2 mg·mL-1,the rGO/ZnS composites had the best rate performance and the best cycling stability.
NETL
NSTL
万方数据
