Journal
JOURNAL OF POWER SOURCES
Volume 278, Issue -, Pages 190-196Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2014.11.140
Keywords
Lithium ion battery; Safety; Non-flammable electrolyte; (Ethoxy) pentafluorocyclotriphosphazene; Flame-retardant additive; High-voltage
Funding
- Key Research Program of the Chinese Academy of Science [KGZD-EW-202-4]
- Natural Science Foundation of Zhejiang [LY13B030007]
- Natural Science Foundation of Ningbo [2014A610049]
- China Postdoctoral Science Foundation [2014M560498]
- Ningbo Science and Technology Innovation Team [2012B82001]
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A high-efficiency flame-retarding additive, (Ethoxy)pentafluorocyclotriphosphazene (N3P3F5OCH2CH3, PFPN), has been synthesized and explored as a safer protection additive for rechargeable lithium batteries. The flammability tests indicate that only the addition of 5 wt% PFPN can make the electrolyte be totally non-flammable. As far as we know, the PFPN additive is the most efficient one of any flame-retarding additive ever synthesized and reported in the literature. The charge discharge results demonstrate that the PFPN additive shows a good electrochemical compatibility on the graphitic anode and LiCoO2 cathode. Meanwhile, the incorporated PFPN additive can greatly improve the cyclic performance of LiCoO2 electrode at a high cut-off voltage of 4.5 V, showing a prospective flame-retarding additive for the applications in high-voltage lithium ion batteries. (C) 2014 Elsevier B.V. All rights reserved.
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