摘要
尖晶石LiMn2O4作为高能锂离子二次电池的正极材料,其原料资源丰富、生产工艺简单、环境污染小、可回收利用,成为近年来人们研究的热点,被公认为最有潜力取代LiCoO2的正极材料之一。但是它的性能还不尽如人意,例如在循环及存放的过程中会出现容量衰减,高温情况下尤为严重。为了提高LiMn2O4正极材料的电化学性能,国内外研究者尝试了多种方法,例如元素掺杂、表面包覆、工艺改进等,其中掺杂金属元素已经被证明是最佳途径。结合作者所在实验室的工作,对稀土元素掺杂改变尖晶石LiMn2O4正极材料电化学性能的研究进行了综述。
Spinel LiMn2O4 is one of the most promising cathode materials for high energy lithium ion secondary batteries.It has drawn much attention because of the advantages of abundant raw material,simple process,little pollution,and easy recycling in recent years.It is regarded as one of the best cathode materials to replace LiCoO2.However,its performance is not good enough for practical application,such as its capacity decreases after storage or during cycling,especially at elevated temperature.To improve the electrochemical cycleability of LiMn2O4 cathode,a lot of methods have been attempted,such as elements doping,surface coating,process improving,etc.Among them,metallic ions doping of LiMn2O4 is proved to be an effective way.Combined with our work,research progress in modification of spinel LiMn2O4 cathode materials by rare earth elements doping is reviewed in this paper.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2006年第z1期16-20,共5页
Journal of the Chinese Society of Rare Earths
