层状LiNi_xCo_yMn_(1-x-y)O_2正极材料的制备及改性研究进展  

Progress in Research of Preparation and Modification of Layered LiNi_xCo_yMn_(1-x-y)O_2

作　　者：刘伶[1] 孙克宁[1] 杨同勇[1] 王莹[1] 

机构地区：[1]哈尔滨工业大学,黑龙江哈尔滨150001

出　　处：《稀有金属快报》2008年第1期7-11,共5页Rare Metals Letters

基　　金：863国家高技术研究发展计划资助

摘　　要：综述了近年来有关于层状LiNixCoyMn1-x-yO2正极材料的研究进展,重点介绍了LiNi1/3Co1/3Mn1/3O2的结构及4种主要合成方法——高温固相法、共沉淀法、溶胶-凝胶法和喷雾干燥法,比较了不同合成方法及组成对材料性能的影响。层状LiNixCoyMn1-x-yO2正极材料具有价格低廉,热稳定性好,容量高等优点,但由于其制备比较困难,振实密度低,高倍率放电性能不好,影响了其商业化的进程。因此,探索新的制备方法,对材料进行掺杂和包覆改性,进一步提高正极材料的振实密度和电化学性能仍是今后的研究热点。The cathode material of layered LiNixCoyMn1-x-yO2 has been regarded as one of the most promising alternative material for Li- CoO2, in terms of low cost, good thermal stability and high capacity. However, this material has some problems, such as hard to synthesize, low tap density and low rate capability, which make the procedure of its commercial availability slow. In this paper, the researches in recent years on layered LiNixCoyMn1-x-yO2 as a novel cathode material for lithium-ion battery were analyzed, which structure was recommended as taking LiNi1/3Co1/3Mn1/3O2 for example. The influences of different synthesis methods and composition on properties of layered LiNixCoyMn1-x-yO2 were compared, and the measures to improve the properties of layered LiNixCoyMn1-x-yO2 were put forward. Finally, the development of the layered cathode material was forecasted.

关 键 词：锂离子电池 层状LiNixCoyMn1-x-yO2 正极材料 电化学性能 

分 类 号：TM912.9[电气工程—电力电子与电力传动]