固相法制备的负极材料钒酸锂的性能

Performance of anode material lithium vanadate prepared by solid state method

采用固相法制备钒酸锂（Li3VO4），研究产物作为锂离子电池负极材料的电化学性能。在500℃时煅烧制备的样品，循环稳定性良好，以0．1mA／cm2的电流密度在3．00—0．02V循环，第70次循环的充、放电比容量均保持在405．1mAh／g。煅烧温度对产物的比容量有影响，在400℃、600℃时煅烧制备的样品，第70次循环的充电比容量分别为108．8mAh／g、40．5mAh／g，放电比容量分别为109．9mAh／g、40．5mAh／g。Li3V04的电化学性能与纯度、尺寸有关。

Lithium vanadate（ Li3 VO4 ）was prepared by solid-state reaction method, the electrochemical performance of product as anode material for Li-ion battery was studied. Li3VO4 prepared via calcining at 500 ℃ exhibited fine cycle stability, its specific charge and discharge capacities in the 70th cycle were both 405. 1 mAh/g when cycled at a current density of 0. 1 mA/em2 in 3.00 -0. 02 V. The specific capacities of product was affected by calcining temperature,the specific charge capacities in the 70th cycle of sample prepared by calcining at 400 ℃ and 600 ℃ were 108. 8 mAh/g and 40. 5 mAh/g,respectively,the specific discharge ca- pacity were 109. 9 mAh/g and 40. 5 mAh/g,respectively. The electrochemical performance of Li3VO~ was relevant to its purity and