液相法制备的LiV_3O_8的电化学性能

Electrochemical properties of LiV_3O_8 prepared by solution method

采用液相法合成了LiV3O8电极材料。X射线衍射分析表明:产物(100)衍射峰强度与用高温固相方法得到的相比明显降低。将其作为水溶液电解质锂离子电池的负极材料,恒流充放电结果显示:在-1 5～-0 2V(vs SCE)电位范围内,产物的首次放电比容量可达96mAh/g。研究了导电剂乙炔黑的添加量对电极的首次放电比容量的影响,发现乙炔黑的添加量在10%左右最佳。

LiV_3O_8 was synthesized by solution method. The X-ray diffraction pattern showed that the product presented a lower intensity at (100) peak compared with that prepared by high temperature solid-state reaction method. The prepared LiV_3O_8 was characterized as an anode material of aqueous electrolyte Li-ion battery. A specific discharge capacity of 96 mAh/g was obtained in the potential range of -1.5～-0.2 V (vs.SCE) for the initial constant current charge-discharge cycle. The relationship between the amount of conductive additives and the initial discharge (capacity) was investigated, the results showed that the best ratio for (acetylene) black to LiV_3O_8 electrode should be 10%.