CNTs-TiO_2锂离子电池负极材料的制备及电化学性能测试

Preparation and Electrochemical Performance Testing of CNTs-TiO_2 Anode Materials for Lithium Ion Batteries

采用热处理和机械混合的方法制备CNTs-TiO2锂离子电池负极材料。CNTs-TiO2负极材料的表面形态及物相通过扫描电子显微镜(SEM)、BET比表面积测试和X射线衍射(XRD)仪进行表征;通过充放电循环测试,表征CNTs-TiO2负极材料的充放电库仑效率、充放电性能及循环性能。实验结果表明:CNTs-TiO2在倍率为0.1C时,首次放电比容量达到213mAh·g-1,在第50次循环后,比容量稳定在143mAh·g-1,体现出良好的循环稳定性。

CNTs - TiO2 composite materials are prepared by the heat treatment and mechani- cal mixing methods. The surface morphology and physical characterization of the CNTs-TiO2 are obtained with scanning electron microscopy （SEM）, BET measurements and X-ray diffraction （XRD）. Charge-discharge cycle test is used to study the cycle performance reversibility and efficiency. Experimental results show that the initial discharge capacity reaches 213 mAh. g-1 at the charge-discharge rate of 0.1 C, and the capacity retention is 143 mAh. g-1 after 50 cycles, implying a good cycle stability.