Sol-gel Synthesis and Electrochemical Performance of Li4-xMgxTi5-xZrxO12 Anode Material for Lithium-ion Batteries

作     者：Caixia Qiu Zhongzhi Yuan Ling Liu Sijie Cheng Jincheng Liu 

作者机构：School of Chemistry and Environment South China Normal University Guangzhou Guangdong 510006 China EVE Energy Co. Ltd Huizhou Guangdong 516006 China 

出 版 物：《Chinese Journal of Chemistry》 (中国化学（英文版）)

年 卷 期：2013年第31卷第6期

页      面：819-825页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the Science and Technology Plan Project of Guangdong Province  China 

主　　题：Li4Ti5O12 Mg-Zr doping rate performance lithium-ion battery 

摘      要：The anode materials Li4-xMgxTi5-xZrxO12（x=0, 0.05, 0.1） were successfully synthesized by sol-gel method using Ti（OCaH9）4, CH3COOLi·2H2O, MgCl2·6H2O and Zr（NO3）3·6H2O as raw materials. The crystalline structure, morphology and electrochemical properties of the as-prepared materials were characterized by XRD, SEM, cyclic voltammograms （CV）, electrochemical impedance spectroscopy （EIS） and charge-discharge cycling tests. The re- sults show that the lattice parameters of the Mg-Zr doped samples are slightly larger than that of the pure LiaTi5Oi2, and Mg-Zr doping does not change the basic Li4Ti5O2 structure. The rate capability of Li4-xMgxTi5-xZrxO12 （x= 0.05, 0.1） electrodes is significantly improved due to the expansile Li＋ diffusion channel and reduced charge transfer resistance. In this study, Li3.95Mg0.05Ti4.95Zr0.05O12 represented a relatively good rate capability and cycling stability, after 400 cycles at 10 C, the discharge capacity retained as 134.74 mAh·g-1 with capacity retention close to 100%. The excellent rate capability and good cycling performance make Li3.95Mg0.05Ti4.95Zr0.05O12 a promising anode material in lithium-ion batteries.