▎ 摘　　要

2LiFePO(4)center dot Li3V2(PO4)(3)@carbon/graphene (2LFP center dot LVP@C/G) as a cathode material, based on an in situ grown Fe-4(VO4)(4)center dot 15H(2)O precursor on the surface of graphene oxide, was synthesized by a solid-state process. The X-ray diffraction Rietveld refinement and Raman spectroscopy results indicated that multi-phase structural 2LiFePO(4)center dot Li3V2(PO4)(3) with a carbon/graphene coating was obtained. The morphology is characterized by HRTEM tests, which reveal well crystallized 2LFP center dot LVP@C/G with bridging graphene nanosheets, forming an effective three-dimensional conducting network. Compared with 2LiFePO(4)center dot Li3V2(PO4)(3)@carbon (2LFP center dot LVP@C), the electrochemical results demonstrate that the 2LFP center dot LVP@C/G electrode measured at 0.1 C and 10 C can deliver a high specific discharge capacity of 151.2 mA h g(-1) and 125.4 mA h g(-1), respectively, and has a discharge capacity of 100.2 mA h g(-1) at -30 degrees C at 0.1 C, indicating better rate capability and thermal properties.