富锂锰基Li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_2正极材料的制备及电化学性能研究  

Synthesis and electrochemical performance of Li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_2 cathode material for lithium ion battery

作　　者：张新河 汤春微 马小林[3] 杜陈强 唐致远[1] 

机构地区：[1]天津大学化工学院应用化学系,天津300072 [2]东莞迈科新能源有限公司,广东东莞523800 [3]天津工业大学理学院,天津300387

出　　处：《电源技术》2017年第11期1513-1515,共3页Chinese Journal of Power Sources

基　　金：广东省高性能锂离子电池研发与产业化创新团队项目(2013N079)

摘　　要：采用新颖的一步共沉淀法合成富锂锰基Li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_2正极材料。通过X射线衍射光谱法(XRD)、扫描电子显微镜法(SEM)和电化学测试对合成材料的晶体结构、形貌及电化学性能进行了测试和表征。结果表明,所制备Li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_2正极材料具有较好的多面体形貌,材料颗粒粒径小于500 nm。在2.0~4.8 V充放电区间内,在18 m A/g进行充放电,所制备材料的首次放电比容量达到209.0 m Ah/g,循环50次后容量保持率为87.7%。The layered Li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_2 lithium-rich manganese-based solid solution cathode material was synthesized by a novel co-precipitation method. The structure, morphology and electrochemical performance of Li_(1.2)Mn_(0.54)Ni_(0.13)Co_(0.13)O_2 were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM) and electrochemical tests. The results show that the material has a regular polyhedron shape with the particle size below500 nm. This material can deliver a high initial discharge specific capacity of 209.0 mAh/g at the current of 18 mA/g within 2.0-4.8 V. After 50 cycles, the sample still can keep capacity retention of 87.7%.

关 键 词：锂离子电池 共沉淀法 Li1.2Mn0.54Ni0.13Co0.13O2 正极材料 

分 类 号：TM912.9[电气工程—电力电子与电力传动]