摘要
锂离子电池正极材料在循环过程中存在着容量衰减的问题,其中Jahn-Teller效应是锂离子电池正极材料尖晶石LiMn2O4在应用中容量衰减的难点。文章利用溶胶凝胶法制备富锂尖晶石Li1+xMn2-xO4,通过X射线衍射、晶格参数和cMn4+/cMn3+比值等参数,研究尖晶石LiMn2O4的Jahn-Teller效应;结果表明,当煅烧温度t=650℃,x=0.05时,有利于抑制Jahn-Teller效应。
Spinel LiMn2O4 ,which is one of the most promising anode materials for lithium-ion batteries,has some problems in use, and one of them is fading of capacity after cycling. The Jahn-Teller effect is one of the major factors leading to the capacity fading of spinel LiMn2O4. Li-rich spinel Li1＋xMn2-xO4 was prepared by the sol-gel method,the Jahn-Teller effect of spinel LiMn2O4 has been researched by analyzing the XRD measurement,lattice constants and the ratio of CMn^4＋/CMn^3＋. The results show that the Jahn-Teller effect is inhibited when the calcinatin temperature reaches 650 ℃ and x=0.05.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2007年第1期86-90,共5页
Journal of Hefei University of Technology：Natural Science
基金
安徽省教育厅自然科学基金资助项目(050601D2)
