以钛酸四丁酯（TBT）、氢氧化锂（LiOH·H₂O）为原料，采用水热法合成锂离子电池负极材料纳米片状钛酸锂（Li₄Ti₅O₁₂）。通过X-射线衍射、扫描电子显微镜、恒流充放电及电化学阻抗等技术对合成材料的结构、表面形貌及电化学性能进行表征。结果表明，制备的材料为片状结构，具有较大的比表面积，分散性较好。在电压为1.0~2.5 V，以0.5 C的倍率进行充放电，首次放电比容量高达180.2 mAh/g，循环50次后，容量仍保持162.2 mAh/g。在10 C高倍率下，放电比容量仍高达130.7 mAh/g，材料表现出优异的循环性能和倍率性能。

Li₄Ti₅O₁₂ nanosheets anode material for lithium-ion batteries is synthesized by hydrothermal method using tetrabutyl titanate (TBT) and lithium hydroxide (LiOH·H₂O) as raw materials.The structure,surface morphology and electrochemical properties of the prepared material are characterized by X-ray diffraction,scanning electron microscopy,galvanostatic charge-discharge,electrochemical impedance spectroscopy and cyclic voltammetry.The results show that the prepared materials are in the form of nanosheets,which have large specific surface area and good dispersivity.The initial discharge capacity is as high as 180.2 mAh·g^-1 when the charge-discharge is performed at 0.5 C-rate in the range of 1.0-2.5 V.The capacity remains 162.18 mAh·g^-1 after being cycled for 50 times.At a higher rate of 10 C-rate,the discharge capacity is still as high as 130.7 mAh·g^-1.This material exhibits excellent cycle performance and rate performance.

于小林(1991-),女,硕士研究生,主要从事电池材料研究,512743132@qq.com。