锂离子电池用层状LiMnO2基正极材料的研究进展

层状LiMnO2材料因其结构不稳定、循环性能差,因而需对其进行掺杂改性.层状锰系衍生物具有比容量高、循环性能稳定等优点,已成为锂离子电池新的发展方向.介绍了目前对LiMnO2的掺杂改性研究,对多元层状锰基固溶体正极材料作了重点阐述.总结了近年来关于多元层状锰基正极材料的研究发展,介绍了其晶体结构、电化学性能、合成与制备技术,以及进一步的改性研究.如果多元层状固溶体材料的高倍率放电性能得到进一步的提高,则其必将成为新的一代锂离子电池正极的首选材料.

RESEARCH PROGRESS ON LAYERED LiMnO2-BASED CATHODE MATERIALS FOR LITHIUM-ION BATTERIES

Research of the effects of doping modification on layered LiMnO2 material has been carried out because of its unstable structure and poor retention capacity. Layered LiMnO2 has a higher retention capacity and stable cycle performance, and it has become a promising material in the recent development of the next-generation positive electrode materials for lithium-ion batteries. Research of doping modification of layered LiMnO2-based cathode materials, especially multi element doping manganese base solid solution, is reviewed. The progress in recent years in research of multi-doped layered manganese-based positive electrode materials, such as its crystal structure, synthesis methods, and electrochemical properties, as well as the research of further modifications, are summarized. The exploration of simple synthesis methods and improvement of these materials will accelerate its application for lithium-ion batteries in the near future. If the discharge capability of multi-element doped layered solid solution materials is further enhanced, LiMnO2 will be the first choice for a positive electrode material in the development of lithium ion batteries.