石墨掺杂钛酸锂负极材料的合成及性能研究  

Research on synthesis and performance of graphite-doped Li_4Ti_5O_(12) catode for lithium ion batteries

作　　者：于海英[1,2] 王垒[1,3] 梁晓丽[1] 其鲁[2] 

机构地区：[1]内蒙古工业大学化工学院,呼和浩特010051 [2]北京大学化学系,北京100190 [3]北京石油化工学院应用化学系,北京102617

出　　处：《化工新型材料》2014年第2期111-112,115,共3页New Chemical Materials

基　　金：内蒙古工业大学科学研究项目基金(ZD200907);内蒙古自治区高等学校科学研究项目(NJZY11074)

摘　　要：以钛酸锂,二氧化钛,石墨为原料采用固相烧结法制备了Li4Ti5O12/graphite复合材料。采用X-射线衍射、扫描电镜和电化学测试等对合成产物进行了表征。结果表明制得的Li4Ti5O12/graphite复合材料的首次可逆容量达到152mAh/g;在0.2C倍率下,经160次循环后,容量仍能保持111.5mAh/g。与纯Li4Ti5O12相比,Li4Ti5O12/graphite复合材料具有更高的可逆容量,表现出较好的循环性能,是一种优良的锂离子电池负极材料。Li4 Ti5 O12/graphite composite was prepared by solid-state method using TiO2 -anatase, Li2 COa and graph-ite as raw materials. The composite was characterized by X-ray diffraction（XRD）, scanning electron microscopy（SEM）com-bined with electrochemical tests. Results showed that The composite can deliver a first specific capacity of 152mAh/g; at 10C, it was still 111.5mAh/g after 160 cycles. Compared with pure Li4 Ti5 O12, the composite shared larger specific Capaci-ty, better cyclability, suggesting that the composite was a promising cathode material for lithium ion batteries.

关 键 词：锂离子电池 钛酸锂 石墨 固相法 

分 类 号：TM912[电气工程—电力电子与电力传动]