▎ 摘　　要

In this study, core-shell structured Li3V2(PO4)(3)/C wrapped in graphene nanosheets has been successfully prepared. The reduction of graphene oxide and the synthesis of Li3V2(PO4)(3)/C are carried out simultaneously using a chemical route followed by a solid-state reaction. The effects of conducting graphene are studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectra and electrochemical measurements. The results reveal that the graphene sheets not only form a compact and uniform coating layer throughout the Li3V2(PO4)(3)/C, but also stretch out and cross-link into a conducting network around the Li3V2(PO4)(3)/C particles. Thus, the graphene decorated Li3V2(PO4)(3)/C electrode exhibits superior high-rate capability and long-cycle stability. It delivers a reversible discharge capacity of 178.2 mAh.g(-1) after 60 cycles at a current density of 0.1 C, and the rate performances of 176, 169.3, 156.1 and 135.7 mAh.g(-1) at 1, 2, 5 and 10 C, respectively. The superior electrochemical properties make the graphene decorated Li3V2(PO4)(3)/C composite a promising cathode material for high-performance lithium-ion battery.