锌掺杂对Li_4Ti_5O_(12)负极材料电化学性能的影响  

Effect on Electrochemical Properties of Zinc Doped Li_4Ti_5O_(12)

作　　者：金星[1] 陶春然 廉今兰[2] 

机构地区：[1]吉林化工学院化学与制药工程学院,吉林132022 [2]吉林化工学院环境与生物工程学院,吉林132022

出　　处：《科学技术与工程》2015年第16期117-120,共4页Science Technology and Engineering

基　　金：吉林省科技厅科技发展基金项目(201207213)资助

摘　　要：通过溶胶凝胶法制备Li4Ti5O12及锌掺杂Li4-2x/3ZnxTi5-x/3O12(x=0.05,0.10,0.15,0.20)活性材料,并优化了最佳掺杂量为x=0.10。通过X射线衍射(XRD)、扫描电镜(SEM)、恒流充放电测试对材料进行结构、形貌及电化学性能表征。结果表明:掺杂适量的锌离子不会改变钛酸锂的尖晶石结构和形貌,1C时,Li3.93Zn0.10Ti4.97O12放电比容量升高且容量保持率为99.74%;而纯相的容量保持率仅为94.30%。I Abstractl A series of Li4-2x/3ZnxTi5-x/3O12（x =0, 0.05,0. 10,0. 15,0. 20） active materials were prepared by Sol-Gel method. The optimized zinc doping amounts was x = 0. 10. Material structure, morphology and electro- chemical performance were characterization by X-ray diffraction （XRD）, Scanning electron microscope （SEM）, Constant current charge-discharge test. The result showed that： After doping zinc ions, the spinal structure and morphology did not changed after doping amount of zinc ion. The discharge specific capacity of Li3.93Zn0. 10Ti4.97O12 was increased and the retention of capacity was 99.74% at 1C. However, the retention of capacity of the pure Li4Ti5O12 was only 94. 30%.

关 键 词：锂离子电池 LI4TI5O12 掺杂 ZN^2+ 

分 类 号：O614.23[理学—无机化学]