反应气氛对Li_4Ti_5O_(12)/C复合材料性能的影响  

Influence of Reaction Atmosphere on Electrochemical Performances of Li_4Ti_5O_(12)-C Composites

作　　者：杨绍斌[1] 蒋娜[1] 

机构地区：[1]辽宁工程技术大学材料科学与工程学院,阜新123000

出　　处：《应用化学》2009年第7期835-839,共5页Chinese Journal of Applied Chemistry

摘　　要：以葡萄糖为碳源,采用固相法制备了Li4Ti5O12/C复合材料。探讨了不同反应气氛(N2/O2)对材料物理性质及电化学性能的影响,并通过XRD、SEM、BET、电导率、电性能等测试手段对其进行了表征。结果表明,N2气气氛中烧结的样品粒度、比表面积、电导率均比空气中烧结样品大。N2气中烧结样品的倍率性能优于空气中烧结样品,在以0.1C倍率充放电时,首次放电比容量为166.8mA.h/g。2种样品在1C时,经过50次循环容量保持率差别不大。This paper deals with the differences of physical properties and electrochemical performances of two Li4TisO12-C composites synthesized under different reaction atmospheres. The composites were characterized by X-ray diffraction （ XRD）, scanning electron microscopy （ SEM ）, BET, electric conductivity and electrochemical tests. Results show that the size, BET and electric conductivity of the sample sintered under N2 were all higher than those of sample sintered under air. The rate property of the sample sintered under N2 is better than that of the sample sintered under air. The initial specific capacity of the sample sintered under N2 is 166.8 mA ·h/g at 0. 1 C. Cycle efficiency of the two samples are similar after cycled 50 s at 1 C.

关 键 词：锂离子电池 LI4TI5O12 反应气氛 葡萄糖 电导率 

分 类 号：O614.1[理学—无机化学]