中国物理B ›› 2023, Vol. 32 ›› Issue (5): 56101-056101.doi: 10.1088/1674-1056/acb919
Zr-doping stabilizes spinel LiMn2O4 as a low cost long cycle life cathode for lithium ion batteries
Xiang-Gong Zhang(张祥功)1, Wei Wu(吴伟)2, Si-Si Zhou(周思思)1,†, Fei Huang(黄飞)2, Shi-Hao Xu(许诗浩)2, Liang Yin(尹良)2,3,‡, Wei Yang(杨伟)2,§, and Hong Li(李泓)2,3
- 1 Wuhan Institute of Marine Electric Propulsion, Wuhan 430064, China;
2 Tianmu Lake Institute of Advanced Energy Storage Technologies Co., Ltd., Liyang 213300, China;
3 Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Zr-doping stabilizes spinel LiMn2O4 as a low cost long cycle life cathode for lithium ion batteries
Xiang-Gong Zhang(张祥功)1, Wei Wu(吴伟)2, Si-Si Zhou(周思思)1,†, Fei Huang(黄飞)2, Shi-Hao Xu(许诗浩)2, Liang Yin(尹良)2,3,‡, Wei Yang(杨伟)2,§, and Hong Li(李泓)2,3
- 1 Wuhan Institute of Marine Electric Propulsion, Wuhan 430064, China;
2 Tianmu Lake Institute of Advanced Energy Storage Technologies Co., Ltd., Liyang 213300, China;
3 Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
摘要： The present commercial spinel LiMn$_{2}$O$_{4}$ delivers only 90 mAh/g-115 mAh/g, far lower than the theoretical specific capacity. It degrades fast caused by the Jahn-Teller effect, Mn dissolution and related side reactions that consume Li inventory. In this work, Zr doping is employed to improve the structural stability and electrochemical performance of spinel LiMn$_{2}$O$_{4}$. Li$_{1.06}$Mn$_{1.94-x}$Zr$_{x}$O$_{4}$ ($x = 0$, 0.01, 0.02, 0.04) have been successfully synthesized by a simple solid-state reaction method and evaluated as cathode for lithium ion batteries (LIB). Li$_{1.06}$Mn$_{1.92}$Zr$_{0.02}$O$_{4}$ is superior cathode material with a high capacity of 122 mAh/g at 1-C rate; long cycle stability, 98.39% retention after 100 cycles at 1-C rate, excellent high rate performance 107.1 mAh/g at 10-C rate, and high temperature performance 97.39% retention after 60 cycles. These are thought to be related to Zr doping effectively stabilizing the spinel LiMn$_{2}$O$_{4}$, by forming stronger Zr-O bonds in the octahedron, suppressing the Jahn-Teller effect, thus improving electrochemical performance.
中图分类号: (Structure of bulk crystals)
- 61.50.-f