摘要
利用流变相反应法合成了两种化合物LixMn2O4(0.90≤x≤1.2)和LiMn2-xCoxO4(0.05≤x≤0.5),探讨了不同锂含量对尖晶石材料结构和性能的影响,并对掺钴材料LiMn2-xCoxO4的结构和电化学性能作了初步研究。不同Li/2Mn对合成的尖晶石LiMn2O4的结构有很大的影响,对于纯的尖晶石LiMn2O4化合物,其Li/2Mn值应控制在0.95￣1.15之间。Co3+离子掺入到LiMn2O4能稳定尖晶石的骨架结构,并且极大地改善了LiMn2O4在充放电过程中的循环稳定性能。
Two compounds of LixMn2O4 （ 0.90 ≤x ≤ 1.2 ）and LiMn2-xCoxO4 （0.05 ≤x ≤0.5） were synthesized by rheological phase reaction, and the effect of different lithium content on spinel structure and performance were discussed. The structure and electrochemical properties of cobalt doped LiMn2-xCOxO4 were studied. Different ratios of Li/2Mn greatly impacted on the structure of synthesized spinel LiMn2O4, as for pure LiMn2O4, its ratio of Li/2Mn should be controlled between 0.95-1.15. Co^3＋ doping into LiMn204 can stabilize the spinel framework, and improve the cyclic stability of LiMn2O4 during the charge-discharge process.
出处
《电源技术》
CAS
CSCD
北大核心
2006年第9期736-739,共4页
Chinese Journal of Power Sources
基金
广西自然科学基金项目(0342037)
关键词
尖晶石结构
流变相反应
掺杂
循环性能
spinel structure
rheological phase reaction
doping
cyclic performance
