Preparation and Electrochemical Properties of 3D Flower-Like VO2(B)Cathode Material
With vanadium pentoxide and citric acid as raw materials,a kind of 3D flower-like VO2(B)electrode material with large specific surface area and excellent structural stability was prepared by adopting hydrothermal synthesis.The crystal structure and morphology of the VO2(B)electrode material were characterized by X-ray diffraction,scanning electron microscope,and transmission electron microscope,and the electrochemical properties of VO2(B)electrode material were measured by constant current charge and discharge,as well as cyclic voltammetry.The results show that the first specific dischage capacity of 3D flower-like VO2(B)electrode material is 227 mAh/g at a current density of 0.1 A/g.It delivers the first specific discharge capacity of 151 mAh/g at a high current density of 1 A/g,and retains 79.6％of this capacity after 300 charge-discharge cycles,exhibiting a good rate performance.
lithium-ion batteryvanadium dioxidecathode materialcycling performance3D flower-like structurevanadium electrode material
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