Synthesis and Electrochemical Lithium Storage Performance of WO_3 Nanorods/Graphene Nanocomposites

WO3nanorods/graphene nanocomposites(WO3/RGO) were prepared by the solvothermal treatment of tungsten hexachloride and graphene oxide in alcohol.The electrochemical performance of WO3/RGO as anode materials for lithium- ion batteries was investigated by galvanostatic charge- discharge tests,cyclic voltammetry(CV),and electrochemical impedance spectroscopy(EIS).The discharge capacity of the composite at the first cycle was 761.4 mAh?g-1,and about 635 mAh?g-1of reversible capacity remained after 100 cycles at a rate of 0.1C(1C=638 mA?g-1).The corresponding retention rate was 83.4%.The reversible capacity remained lager than 460 mAh?g-1at a rate of 5C.WO3/RGO exhibited excellent cycling stability and rate performance,and has potential in advanced lithium-ion batteries.