中国物理B ›› 2018, Vol. 27 ›› Issue (8): 88202-088202.doi: 10.1088/1674-1056/27/8/088202
• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇 下一篇
Improved electrochemical performances of high voltage LiCoO2 with tungsten doping
Jie-Nan Zhang(张杰男), Qing-Hao Li(李庆浩), Quan Li(李泉), Xi-Qian Yu(禹习谦), Hong Li(李泓)
- 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
Improved electrochemical performances of high voltage LiCoO2 with tungsten doping
Jie-Nan Zhang(张杰男)1,2, Qing-Hao Li(李庆浩)1, Quan Li(李泉)1,2, Xi-Qian Yu(禹习谦)1, Hong Li(李泓)1,2
- 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
摘要：
The effects of tungsten W doping and coating on the electrochemical performance of LiCoO2 cathode are comparatively studied in this work. The amount of modification component is as low as 0.1 wt% and 0.3 wt% respectively. After 100 cycles between 3.0 V-4.6 V, 0.1 wt% W doping provides an optimized capacity retention of 72.3%. However, W coating deteriorates battery performance with capacity retention of 47.8%, even lower than bare LiCoO2 of 55.7%. These different electrochemical performances can be attributed to the surface aggregation of W between doping and coating methods. W substitution is proved to be a promising method to develop high voltage cathodes. Practical performance relies on detailed synthesis method.
中图分类号: (Lithium-ion batteries)
- 82.47.Aa