Mechanism of capacity fade of MCMB/Li1.1[Ni1/3Mn1/3Co1/3]0.9O2 cell at elevated temperature and additives to improve its cycle life

被引:87
作者
Amine, Khalil [1 ]
Chen, Zonghai [1 ]
Zhang, Z. [1 ]
Liu, Jun [1 ]
Lu, Wenquan [1 ]
Qin, Yan [1 ]
Lu, Jun [1 ]
Curtis, Larry [1 ]
Sun, Yang-Kook [2 ]
机构
[1] Argonne Natl Lab, Electrochem Technol Program, Chem Sci & Engn Div, Argonne, IL 60439 USA
[2] Hanyang Univ, Dept WCU Energy Engn, Seoul 133791, South Korea
关键词
ION CELLS; PHOSPHO-OLIVINES; LITHIUM; ELECTROLYTE; ANODE;
D O I
10.1039/c1jm11584g
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The performance degradation of graphite/Li-1.1[Ni1/3Mn1/3Co1/3](0.9)O-2 lithium-ion cells at elevated temperature was investigated. The electrochemical data suggest that the migration of dissolved transition metals from the cathode to the anode is the key contributor to the performance degradation. With the help of density function theory calculations, lithium difluoro[oxalato] borate was tested to be an effective electrolyte additive to mitigate the performance degradation of lithium-ion cells. The application of this novel electrolyte additive was found to significantly improve both the life and safety characteristics of graphite/Li-1.1[Ni1/3Mn1/3Co1/3](0.9)O-2 lithium-ion cells.
引用
收藏
页码:17754 / 17759
页数:6
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