期刊
ELECTROCHIMICA ACTA
卷 137, 期 -, 页码 1-8出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.05.136
关键词
lithium-ion battery; electrolyte; lithium difluoro(oxalato)borate; solid electrolyte interphase
资金
- Samsung SDI, Korea
- MSIP(Ministry of Science, ICT & Future Planning), Korea [NIPA-2013-H0301-13-1009]
Lithium difluoro(oxalato)borate (LiFOB) is investigated as an additive for enhancing the electrochemical performance of high-voltage lithium cobalt oxide (LiCoO2, LCO)/lithium nickel manganese cobalt oxide (LiNi0.6Co0.2Mn0.2O2, NMC) cathodes and high-capacity silicon/graphite (Si-C) anodes. LCO-NMC/Si-C full cells with a LiFOB additive have been found to exhibit improved high temperature electrochemical performance. To confirm the effects of LiFOB on the cathode and the anode, the surface chemistry of the anodes and cathodes cycled in electrolytes with and without the LiFOB additive are examined using ex-situ X-ray photoelectron spectroscopy (XPS). The LiFOB additive produces a LiF-based solid electrolyte interphase (SE!) on the Si-C anode and a carboxylate-based SEI on the LCO-NMC cathode. (C) 2014 Elsevier Ltd. All rights reserved.
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