水热法制备Li_4Ti_5O_(12)负极材料及其电化学性能  

Hydrothermal Synthesis and Electrochemical Properties of Li_4Ti_5O_(12) Anode Material

作　　者：尤亚华[1] 张杨[1] 李学良[1] 肖正辉[1] 周巧[1] 

机构地区：[1]合肥工业大学化工学院合肥工业大学可控化学与材料化工安徽省重点实验室,安徽合肥230009

出　　处：《金属功能材料》2013年第3期28-31,共4页Metallic Functional Materials

摘　　要：以钛酸四丁酯和乙酸锂为原料,水热法制备前驱体,再经过短时间的高温煅烧制备Li4Ti5O12负极材料。利用XRD、SEM和恒电流充放电方法分别测定材料的结构、形貌以及材料的电化学性能。结果表明:制备出的产物Li4Ti5O12颗粒具有尖晶石型结构,其中800°C、6h烧结出的样品具有约800nm的粒径,并表现出优良的电化学性能,0.1C和5C首次放电容量分别达到158.7(mA.h)/g和109.3(mA.h)/g,不同倍率下循环20次容量保持率较好。The Li4Ti5O12 anode material was prepared by hydrothermal synthesis and followed by a short calcination process with tetrabutyl titanate and lithium acetate as raw materials. The crystalline structure, morphology and the electrochemical performance of the material were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM） and the galvanostatic charge-discharge test. The results showed that the pure spinel Li4Ti5O12 obtained at 800 ℃after 6 h with about 800 nm particle size displayed excellent electrochemical performance. The discharge capacity was 158.7 （mA · h）/g and 109.3（mA · h）/g at the 0.1 C and 5 C, respectively. After 20 cycles, the discharge capacity has the better retention radio.

关 键 词：锂离子电池 LI4TI5O12 水热法 放电容量 

分 类 号：TM912[电气工程—电力电子与电力传动]