液相法制备锂离子电池负极材料Li_4Ti_5O_(12)

Preparation of Li_4Ti_5O_(12) as anode material for Li-ion battery by solution method

Li4Ti5O12负极材料因其在充放电过程中"零应变"的优势,得到了广泛关注,成为锂离子电池负极材料的研究热点.采用液相法制备了Li4Ti5O12负极材料.通过正交实验,确定了Li4Ti5O12的最佳制备工艺条件:烧结温度为750℃;烧结时间为8 h;LiOH.H2O为锂源;原料中锂钛的物质的量比为0.85.该条件下制备的材料具有较好的电化学性能,首次放电比容量可达到191.61 mAh/g.

Li4Ti5O12 has been widespread concerned bechuse of the ＂zero strain＂ advantage during charge and discharge, it has been become a research focus as anode material for lithi- umion battery. In this paper, Li4Ti5O12 as anode material was prepared by solution method. The optimum preparation conditions were determined by orthogonal experiments： lithium titanate was heat- treated at 750℃ for 8 h, LiOH · H2O was selected as lithium source, the molar ratio of Li/Ti was 0.85. Li4Ti5 O12 prepared at the optimum conditions had the better electrochemical performances, the initial discharge capacity reached 191.61 mAh/g.