锂离子电池负极材料Li4Ti4.9Ni0.1O12的制备及其电化学性能  

Preparation and Electrochemical Performance of Li4Ti4.9Ni0.1O12 as Anode Material for Lithium Ion Battery

作　　者：石青锋 吴显明[1,2] 丁心雄 刘平 吴亚利 于小林[1] SHI Qing-feng;WU Xian-ming;DING Xin-xiong;LIU Ping;WU Ya-ii;YU Xiao-lin(College of Chemistry and Chemical Engineering,Jishou University,Jishou 416000,Hunan,China;Xiangxi Ores Minerals and New Materials Development and Service Center,Jishou 416000,Hunan,China)

机构地区：[1]吉首大学化学化工学院,湖南吉首416000 [2]湘西自治州矿产与新材料技术创新服务中心,湖南吉首416000

出　　处：《精细化工》2019年第6期1180-1184,共5页Fine Chemicals

基　　金：国家自然科学基金(51762016)~~

摘　　要：以Li2CO3、TiO2、Ni(CH3COO)2·4H2O为原料,采用固相法制备尖晶石型Li4Ti4.9Ni0.1O12锂离子负极材料。通过X射线衍射(XRD)、扫描电镜(SEM)、恒流充放电测试以及交流阻抗等技术对材料进行了结构、形貌表征及电化学性能测试。结果表明,制备的Li4Ti4.9Ni0.1O12材料无杂相,颗粒大小均匀,在0.5 C下首次放电比容量为173.3 mA·h/g,库伦效率为97.4%,50次循环后,材料的放电比容量为163.4 mA·h/g,容量保持率为94.3%。Spinel Li4Ti4.9Ni0.1O12 as anode material for lithium-ion battery was successfully synthesized by solid-state reaction method using Li2CO3, TiO2 and Ni(CH3COO)2·4 H2 O as raw materials. Its crystalline structure, morphology and electrochemical properties were characterized by XRD, SEM, half cell chargedischarge tests and AC impedance techniques. The results showed that the synthesized Li4Ti4.9Ni0.1O12 particles were homogeneous without impure phase. The first discharge specific capacity of the Li4Ti4.9Ni0.1O12 sample was 173.3 m A·h/g and the coulombic efficiency was 97.4% at 0.5 C rate. The specific capacity remained 163.4 mA·h/g after 50 cycles with a capacity retention of 94.3%.

关 键 词：锂离子电池 LI4TI5O12 固相法 离子掺杂 有机电化学与工业 

分 类 号：TQ152[化学工程—电化学工业]