熔盐法合成LiMn_(1/3)Ni_(1/3)Co_(1/3)O_2及AA电池的电化学性能  

Synthesis and Performances of Li(Mn_(1/3)Ni_(1/3)Co_(1/3))O_2 as the AA Type of Lithium-ion Batteries by Melting Salt

作　　者：钟盛文[1] 封志芳[1] 谢敏[1] 

机构地区：[1]江西理工大学材料与化学工程学院,江西赣州341000

出　　处：《有色金属科学与工程》2011年第1期9-13,共5页Nonferrous Metals Science and Engineering

基　　金：国家自然科学基金资助项目(50762004)

摘　　要：以KCl为熔盐,采用熔盐法合成了锂离子电池正极材料LiMn1/3Ni1/3Co1/3O2,扫描电子显微镜(SEM)显示此方法制备产物具有较好的晶形,颗粒较均匀.XRD表征结果显示产物为层状结构,充放电测试结果显示出材料在3.6 V平台附近有较大的可逆容量.在900℃时保温8 h时合成的LiMn1/3Ni1/3Co1/3O2具有较好的电化学性能,制作成AA电池,在2.75～4.2 V之间进行充放电测试,在1 C倍率下放电,LiMn1/3Ni1/3Co1/3O2的初始放电容量可达132.9 mAh/g,循环50多次后容量仍为124.6 mAh/g,容量保持率为93.75﹪.The LiMn1/3Ni1/3Co1/3O2 of lithium-ion batteries cathode materials were prepared by molten salt synthesis method,in which KCl was molten salt,and the LiMn1/3Ni1/3Co1/3O2 has satisfactory electrochemical performance.Scanning Electron Eicroscope（SEM） shows that the product is in uniform and particles in even.XRD results demonstrate that the as-synthesized LiMn1/3Ni1/3Co1/3O2 is layered structure.The charge and discharge test results show the sample has a 3.6V plateau and higher reversible capacity.The LiMn1/3Ni1/3Co1/3O2 cathode synthesized at the temperature of 900℃.AA tape of lithium-ion batteries are made with good electrochemical performance.Its initial specific discharge capacity was 132.9mAh/g（2.75～4.2V,1C rate） of better cycle stability.The discharge capacity was 124.6mAh/g after 50 cycles.The rate of discharge capacity was 93.75 ﹪.

关 键 词：锂离子电池 正极材料 熔盐法 LiMn1/3Ni1/3Co1/3O2 

分 类 号：TF122.3[冶金工程—粉末冶金] TM911[冶金工程—冶金物理化学]