Journal
ELECTROCHIMICA ACTA
Volume 165, Issue -, Pages 67-71Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2015.02.247
Keywords
Fluorinated phosphates; Flame retardant; Safety; Lithium ion batteries
Categories
Funding
- National Basic Research Program of China [2015CB251105]
- Program of Hubei Province, Program for New Century Excellent Talents in University [NCET-12-0419]
- Hubei National Funds for Distinguished Young Scholars [2014CFA038]
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Bis(2,2,2-Trifluoroethyl) ethylphosphonate (TFEP) is first synthesized as a flame retardant additive for conventional carbonate electrolyte to improve the safety of lithium ion batteries. The inflammability and electrochemical stability of the TFEP containing electrolyte are studied. The self-extinguishing time test shows that TFEP provides a significant suppression of the flammability of the electrolyte. When adding 20% TFEP, the electrolyte cannot be ignited, exhibiting superior flame retardancy. Cyclic voltammetry and electrochemical charge/discharge tests show that TFEP has insignificant impact on the electrodes' electrochemical performance. The results demonstrate that TFEP can be used as a novel highly effective safety additive for lithium ion batteries. (C) 2015 Elsevier Ltd. All rights reserved.
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