己二酸辅助溶胶-凝胶法合成Li_4Ti_5O_(12)及其电化学性能  

Adipic acid assisted sol-gel synthesis of Li_4Ti_5O_(12) and its performance as anode material for Li-ion batteries

作　　者：唐盛贺[1] 李大光[1] 李军[1] 周燕[1] 陶熏[1] 

机构地区：[1]广东工业大学轻工化工学院,广州510006

出　　处：《化工新型材料》2014年第3期160-162,共3页New Chemical Materials

基　　金：国家自然科学基金项目(21206019);广东省科技计划项目(2012B050100010);广州市科技计划项目(2011Y1-00010)

摘　　要：以己二酸为络合剂,通过溶胶-凝胶法合成了具有优良电化学性能的电极材料Li4Ti5O12。采用XRD、SEM、恒流充放电测试对材料的结构、形貌和电化学性能进行了表征。结果表明:通过该法制备的样品为颗粒细小均匀的立方尖晶石Li4Ti5O12纯相,并显示出优良的电化学性能;0.1C倍率下首次放电比容量为169.59mAh/g,经过30充放电循环后仍然保持在158.17mAh/g。在2.0C倍率下,其可逆容量仍可达到124mAh/g,表现出良好的倍率性能。The electrode material Li4Ti5O12 with excellent electrochemical properties was prepared by a sol-gel method using adipic acid as chelating agent. The structural, morphological and electrochemical properties of samples were characterized by X-ray diffraction（XRD）, scanning electron microscopy（SEM）, galvanostatic charge-discharge experiments. The results showed that the samples prepared in presence of adipic acid with uniform particle distribution showed high-pu- rity cubic spinel Li4 Ti5 O12 phase, and exhibited promising electrochemical properties. The initial discharge specific capacities of the samples was 169.59mAh/g and su- stained a capacity value of 158. 17mAh/g beyond 30 cycles at 0. 1C rate. the sam- ples displaied good rate performance with a reversible capacity reached 124mAh/g even at 2.0C rate.

关 键 词：锂离子电池 LI4TI5O12 己二酸 溶胶-凝胶法 

分 类 号：TM912[电气工程—电力电子与电力传动]