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

Autor:	Jun Lu, Jun Liu, Zhangcheng Zhang, Yang-Kook Sun, Yan Qin, Zonghai Chen, Khalil Amine, Wenquan Lu, Larry Curtis
Rok vydání:	2011
Předmět:	Materials science Inorganic chemistry chemistry.chemical_element General Chemistry Electrolyte Electrochemistry Cathode law.invention Anode Transition metal chemistry law Materials Chemistry Degradation (geology) Lithium Graphite
Zdroj:	Journal of Materials Chemistry. 21:17754
ISSN:	1364-5501 0959-9428
DOI:	10.1039/c1jm11584g
Popis:	The performance degradation of graphite/Li1.1[Ni1/3Mn1/3Co1/3]0.9O2lithium-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/Li1.1[Ni1/3Mn1/3Co1/3]0.9O2lithium-ion cells.
Databáze:	OpenAIRE
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