Journal
JOURNAL OF POWER SOURCES
Volume 227, Issue -, Pages 106-110Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2012.11.018
Keywords
Phosphates; Phosphazenes; Flame retardant; Safety; Lithium-ion batteries
Funding
- National Basic Research Program of China [2009CB220100]
- National Science Foundation of China [21173160]
- State Grid Corporation of China
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In this paper, we prepared a phosphazenic compound triethoxyphosphazen-N-phosphoryldiethylester (PNP) by a facile method and characterized as a flame-retarding electrolyte additive for lithium ion batteries. The flammability and electrochemical performance of the PNP-containing electrolyte were investigated. The self-extinguishing time (SET) value of 10% PNP in the electrolyte is 40% decreased compared to base electrolyte, implying strong inhabitation to the flammability. The electrochemical performances of MCMB/Li, LiFePO4/Li and LiMn2O4/Li half-cells in 10% PNP electrolyte exhibit considerable capacity, coulombic efficiency and cycling stability compared to the base electrolyte. Therefore, PNP as flame-retarding additive is a promising candidate combining efficient flame retardancy and good electrochemical performance for safer lithium ion batteries. (C) 2012 Elsevier B.V. All rights reserved.
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