Abstract: MoO3 was synthesized by hydrothermal method using sodium molybdate and sodium salicylate as raw material.The structure and morphology of the materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and the electrochemical performances of MoO3 were conducted on an electrochemical workstation and a battery tester.The results show that the electrochemical properties of hexagonal MoO3 (h-MoO3) nanobocks prepared by hydrothermal treatment at 180 ℃ for 12 h are much better than the crossed MoO3 (α-MoO3) nanosheets synthesized by hydrothermal treatment at 180 ℃ for 24 h.When it is applied as anodes for lithium ion battery, the initial discharge capacity of h-MoO3 is 2068.1 mAh/g.After 50 cycles, its discharge capacity is 946.4 mAh/g at a current density of 50 mA/g.The outsanding electrochemical performance is attributed to the smaller electrochemical transfer impedance.

Key words: MoO3 was synthesized by hydrothermal method using sodium molybdate and sodium salicylate as raw material.The structure and morphology of the materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and the electrochemical performances of MoO3 were conducted on an electrochemical workstation and a battery tester.The results show that the electrochemical properties of hexagonal MoO3 (h-MoO3) nanobocks prepared by hydrothermal treatment at 180 ℃ for 12 h are much better than the crossed MoO3 (α-MoO3) nanosheets synthesized by hydrothermal treatment at 180 ℃ for 24 h.When it is applied as anodes for lithium ion battery, the initial discharge capacity of h-MoO3 is 2068.1 mAh/g.After 50 cycles, its discharge capacity is 946.4 mAh/g at a current density of 50 mA/g.The outsanding electrochemical performance is attributed to the smaller electrochemical transfer impedance.