共沉淀法制多孔类球型钛酸锂及电性能研究  

Synthesis Of Porous Sphere-like Li_4Ti_5O_(12) By Co-precipitation Method And Study On Its Performances

作　　者：刘刚[1,2] 汤占磊 朱玉静[1] 顾元香[1] 王磊[1] 

机构地区：[1]青岛科技大学化学与分子工程学院,山东青岛266042 [2]蒂森电梯有限公司烟台分公司,山东烟台264001

出　　处：《广州化工》2014年第1期3-5,共3页GuangZhou Chemical Industry

基　　金：国家自然科学基金项目(No:51372125)

摘　　要：用NH4HCO3为起泡剂共沉淀法成功的合成出一种多孔类球形钛酸锂,并对它的结构及电化学性能进行了研究。经测试表明合成出的Li4Ti5O12振实密度达到1.68 g/cm3,采用XRD粉末衍射测试表明产物为纯相尖晶石型Li4Ti5O12,扫描电镜表明产物为平均尺寸为2~5μmd的多孔的类球体结构。在1.0~3.0 V下充放电0.1 C、1 C、1.5 C、2 C、3 C倍率下首次放电容量分别为176.4、151.6、143.8、138.5 mAh/g。Porous sphere-like Li4Ti5O12 was successfully synthesized according to a co-precipitation method using NH4HCO3 as pore forming agent. The structure and electrochemical of Li4Ti5O12 were investigated. It showed that the tap-density of Li4Ti5O12 was 1. 68g/cm3. The X-ray diffraction demonstrated that Li4Ti5O12 synthesized was pure spinel-type Li4Ti5O12. The SEM indicated the average particle size of porous microsphere was 2 ~ 5 μm. Between 1. 0V and 3. 0V versus Li the initial discharge specific capacity were 176. 4,151. 6,143. 8,138. 5 mAh / g at the 0. 1 C,1 C, 1. 5 C,2 C,3 C rates,respectively.

关 键 词：锂离子电池 LI4TI5O12 电化学性能 形貌控制 

分 类 号：TQ152[化学工程—电化学工业]