Journal
ELECTROCHIMICA ACTA
Volume 56, Issue 27, Pages 10179-10184Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.09.009
Keywords
1-Butyl-1-methylpyrrolidinium phosphate; Lithium-ion battery; Flame retardant; Electrolyte additive; Thermal stability
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Funding
- MKE/KEIT [KI002176-2010-02]
- National Research Foundation of Korea
- MEST of the Korean Government [NRF-2009-0092780, NRF-2009-C1AAA001-0093307]
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1-Butyl-1-methylpyrrolidinium hexafluorophosphate (BMP-PF6) was used as a flame-retarding additive in the liquid electrolyte, and the influence of BMP-PF6 content on cycling performance and thermal properties of lithium-ion batteries was investigated. Self-extinguishing time and DSC studies demonstrated that the addition of BMP-PF6 to the electrolyte provided a significant suppression in the flammability of the electrolyte and an improvement in the thermal stability of the cell. The optimum BMP-PF6 content in the electrolyte was found to be 10 wt.% for improving safety without degrading cycling performance of the cell. (C) 2011 Elsevier Ltd. All rights reserved.
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