微波水热法合成Li_4Ti_5O_(12)及其性能  

Synthesis and Characterization of Li_4Ti_5O_(12) Prepared by Microwave Hydrothermal Method

作　　者：章守权[1,2] 陈春华[1] 

机构地区：[1]中国科学技术大学材料与工程系,安徽合肥239000 [2]滁州学院材料与化学化工学院,安徽滁州239012

出　　处：《过程工程学报》2013年第5期889-892,共4页The Chinese Journal of Process Engineering

基　　金：安徽省高校省级优秀青年人才基金资助项目(编号:2012SQRL157)

摘　　要：采用微波水热法和水热法制备锂离子电池负极材料Li4Ti5O12，比较了合成方法对Li4Ti5O12电化学性能的影响，考察了其结构和形貌及电化学性能．结果表明，两种方法均合成了尖晶石结构的Li4Ti5O12，微波水热法合成的样品电化学性能较好，颗粒尺寸为200-300nm，分布均匀，比表面积较大，在1C的放电条件下，首次放电比容量为151．33mA·h/g，97次循环后放电比容量为140．94mA·h/g，保持率为93．14％，且电化学阻抗较小．Lithium titanate Li4Ti5O12 as lithium ion battery cathode material was synthesized using hydrothermal and microwave hydrothennal methods, the influences of different methods on its electrochemical performance were examined, and its structure, morphology, constant current charge and discharge characterized. The results showed that Li4Ti5O12could be synthesized by both methods, the latter could lead to better electrochemical properties of the sample in smaller and more uniform particle size and larger specific surface area, the first discharge capacity of 151.33 mA.h/g after 97 cycles was 140.94 mA.h/g, the capacity retention rate 93.14%, and the chemical impedance smaller.

关 键 词：锂离子电池 水热法 微波水热法 LI4TI5O12 

分 类 号：O646[理学—物理化学]