Mechanism of capacity fade of MCMB/Li1.1[Ni1/3Mn1/3Co1/3]0.9O2cell at elevated temperature and additives to improve its cycle life

Khalil Amine; Zonghai Chen; Z. Zhang; Jun Liu; Wenquan Lu; Yan Qin; Jun Lu; Larry Curtis; Yang-Kook Sun

doi:10.1039/C1JM11584G

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Mechanism of capacity fade of MCMB/Li_1.1[Ni_1/₃Mn₁_/₃Co₁_/3]_0.9O₂cell at elevated temperature and additives to improve its cycle life†

Khalil Amine,*^a Zonghai Chen,^a Z. Zhang,^a Jun Liu,^a Wenquan Lu,^a Yan Qin,^a Jun Lu,^a Larry Curtis^a and Yang-Kook Sun*^b

Author affiliations

* Corresponding authors

^a Electrochemical Technology Program, Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois, USA

^b Department of WCU Energy Engineering, Hanyang University, Seoul, South Korea

Abstract

The performance degradation of graphite/Li_1.1[Ni_1/₃Mn₁_/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/Li_1.1[Ni_1/₃Mn₁_/₃Co₁_/3]_0.9O₂lithium-ion cells.

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Article information

DOI: https://doi.org/10.1039/C1JM11584G
Article type: Paper
Submitted: 14 Apr 2011
Accepted: 07 Sep 2011
First published: 06 Oct 2011

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J. Mater. Chem., 2011,21, 17754-17759

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Mechanism of capacity fade of MCMB/Li_1.1[Ni_1/₃Mn₁_/₃Co₁_/3]_0.9O₂cell at elevated temperature and additives to improve its cycle life

K. Amine, Z. Chen, Z. Zhang, J. Liu, W. Lu, Y. Qin, J. Lu, L. Curtis and Y. Sun, J. Mater. Chem., 2011, 21, 17754 DOI: 10.1039/C1JM11584G

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Journal of Materials Chemistry