电源技术2017，Vol.41Issue(7)：957-959,3.
阳离子掺杂对LiMn2O4结构和电性能的影响
Effect of cation ion doping on structure and electrochemical performance of LiMn2O4
李伟 1许寒 1丁飞1
作者信息
- 1. 中国电子科技集团公司第十八研究所,天津300384
- 折叠
摘要
Abstract
The spinel LiMn2-xMxO4(M=Co,Cr,Al,Ti,x=0,0.05,0.1,0.15)was synthesized by solid-state reaction method as cathode materials.In this work,the effects of different metal cation ions doping and the amount into LiMn2-xvxO4 on the crystal structure and electrochemical properties were studied.The results confirmed by X-ray diffraction (XRD) show that the samples doped with the samller ionic radius (such as Co,Cr and Al) make the volume of unit cell decrease and the spinel structure more stable.The initial capacity of the material is decreased with the increase of the doping amount,but the cycling performance is significantly improved.When x=-0.1,the Co-doping samples can deliver the first discharge specific capacity of 117.6 mAh/g at 1 C rate,and the rate of capacity retention reaches 92.9％ after 20 cycles,which exhibit the optimal comprehensive performance.关键词
固相法/尖晶石/正极材料/掺杂Key words
solid-state reaction/spinel/cathode materials/doping分类
信息技术与安全科学引用本文复制引用
李伟,许寒,丁飞..阳离子掺杂对LiMn2O4结构和电性能的影响[J].电源技术,2017,41(7):957-959,3.
