摘要
Layered LiV3O8 as promising cathode material for rechargeable lithium-ion batteries has been efficiently synthesized by an improved spray-drying method followed by heating at different temperatures. Results of X-ray diffraction, scanning electron microscopy, charge-discharge test, cyclic voltammogram and electrochemical impedance spectroscopy indicate that the sample heat-treated at 300 掳C shows the best electrochemical performance. The LiV3O8 obtained at 300 掳C displays a maximum discharge capacity of 338.9 mAh g鈭? at current density of 25 mA g鈭? and after 20 cycles, a discharge capacity with 330.5 mAh g鈭? is obtained. Most important is that it displays an excellent cycling stability at large current density. It exhibits high discharge capacity of 251 mA g鈭? at current density of 125 mA g鈭? after 50 cycles.