锂离子电池高镍三元材料的研究进展

用于锂离子电池的高镍三元材料由于成本低、能量密度高、可逆容量高、环境友好等优点,是现在以及未来车用动力电池首选正极材料。本文在综述了高镍三元材料的晶体结构特性和电化学特性的基础上,介绍了国内外主要制备方法、掺杂以及包覆等改性措施,重点讨论了不同种类包覆材料对高镍三元倍率性能、循环性能和高温稳定性能的影响。最后,针对高镍三元电解液、安全性、压实密度及循环寿命等问题进行分析与展望。

Research progress in nickel-rich ternary materials for lithium-ion batteries

Nickel-rich ternary materials for lithium ion batteries are the preferred cathode materials for automotive power batteries at present and in the future,due to their low cost,high energy density,high reversible capacity and environmental friendliness.On the basis of reviewing the crystal structure and electrochemical properties of nickel-rich ternary materials,the main preparation methods at home and abroad,modification methods such as doping,coating and others were introduced.Meanwhile,the effect of different kinds of coating materials on rate performance,cycling performance and good thermal stability of nickel-rich ternary was discussed in details.Finally,the issues about nickel-rich ternary electrolyte solution,safety,compaction density and cycle life were analyzed and prospected.