期刊
JOURNAL OF POWER SOURCES
卷 196, 期 16, 页码 6794-6801出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2010.10.050
关键词
Lithium difluoro(oxalate)borate; Electrolyte additive; Thermal stability; Elevated temperature; Lithium-ion battery
资金
- National Natural Science Foundation of China [NSFC20873046, NSFC21003054]
- Natural Science Foundation of Guangdong Province [10351063101000001]
- Specialized Research Fund for the Doctoral Program of Higher Education [200805740004]
- Project of Guangdong Province [2009B050700039]
Lithium difluoro (oxalate) borate (LiDFOB) is used as thermal stabilizing and solid electrolyte interface (SEI) formation additive for lithium-ion battery. The enhancements of electrolyte thermal stability and the SEIs on graphite anode and LiFePO4 cathode with LiDFOB addition are investigated via a combination of electrochemical methods, nuclear magnetic resonance (NMR), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared-attenuated total reflectance (FTIR-ATR), as well as density functional theory (DFT). It is found that cells with electrolyte containing 5% LiDFOB have better capacity retention than cells without LiDFOB. This improved performance is ascribed to the assistance of LiDFOB in forming better SEIs on anode and cathode and also the enhancement of the thermal stability of the electrolyte. LiDFOB-decomposition products are identified experimentally on the surface of the anode and cathode and supported by theoretical calculations. (C) 2010 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据