期刊
JOURNAL OF POWER SOURCES
卷 213, 期 -, 页码 160-168出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2012.04.009
关键词
Lithium-ion battery; High-voltage cathode; Positive can; Separator; Efficiency; Cycling stability
资金
- Office of Vehicle Technologies of the U.S. Department of Energy [DE-AC02-05CH11231, 18769]
- DOE's Office of Biological and Environmental Research and located at Pacific Northwest National Laboratory
The effects of different cell positive cans and separators on first-cycle Coulombic efficiency and long-term cycling stability of a high-voltage spinel cathode are investigated systematically. Compared to stainless steel (SS) positive cans, aluminum (Al)-clad SS-316 positive cans are much more resistant to oxidation at high voltages; therefore, the initial Coulombic efficiency of the batteries with Al-clad can is improved by more than 13%. Among the five separators studied in this work, the polyethylene (PE) separator exhibits the best electrochemical stability. The cells using LiCr0.05Ni0.45Mn1.5O4 as the cathode, an Al-clad positive can, and a PE separator exhibits a first-cycle Coulombic efficiency of about 90% and a capacity fading of only 0.01% per cycle. (C) 2012 Elsevier B.V. All rights reserved.
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