中文摘要：

采用机械球磨法制备CrTaO4 纳米材料,并首次将其作为锂离子电池负极材料. 利用X射线衍射分析（XRD）、扫描电子显微镜（SEM）、充放电测试、循环伏安（CV） 测试和电化学交流阻抗测试（EIS） 对材料的结构、形貌和电化学性能进行表征. 与传统块材CrTaO4 相比,球磨后的CrTaO4 首次放/充电容量由313/147 mAh/g提高到508/309 mAh/g,充放电50次后放电容量可以保持在124 mAh/g,同时不同倍率进行充放电,充放电80次后改性样品的放电容量仍可维持在140 mAh/g,有效提高了电化学性能.

英文摘要：

CrTaO4 was successively prepared by mechanical ball-milling method and its electrochemical properties were first discussed as an anode material in lithium-ion batteries. The structure, morphology and electrochemical properties were characterized using X-ray diffraction （XRD）, scanning electron microscope （SEM）, galvanostatic discharge-charge test, cyclic voltammetry （CV） and electrochemical impedance spectra （EIS）. Compared with the traditional CrTaO4 material, the initial discharge/charge capacity of sample was improved from 313/147 mAh/g to 508/309 mAh/g through ball-milling method, and discharge capacity could be maintained at 124 mAh/g after 50 cycles. Meanwhile, the discharge capacity could be maintained at 140 mAh/g after 80 cycles at diferent charge-discharge rate.