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Journal of Electrochemistry ›› 2017, Vol. 23 ›› Issue (4): 435-440.doi: 10.13208/j.electrochem.160419

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Tetrabutylammonium Hexafluorophosphate as Flame Retardant Additive for Lithium Ion Batteries

ZHAO Qing1, ZHANG Qian2, FAN Jing-min2*, ZHENG Ming-sen2, DONG Quan-feng2*   

  1. 1. Huai An Institute of Science and Technology Information, Huai'an, 223001; 2. Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China
  • Received:2016-04-19 Revised:2016-05-26 Online:2017-08-25 Published:2016-08-11
  • Contact: Jingmin Fan, Quanfeng Dong E-mail:qfdong@xmu.edu.cn; jmfan@xmu.edu.cn

Abstract: Safety issues have been attracted more and more attentions due to the wide applications of lithium ion batteries. Introducing flame retardant additives are one of the effective strategies to improve the safety of lithium-ion batteries. In this paper, the tetrabutylammonium hexafluorophosphate (TBAPF6) as a flame retardant additive was added to the electrolyte as a flame retardant additive to enhance the safety of lithium ion batteries. The self-extinguishing time (SET) and ionic conductivities of the electrolytes with different TBAPF6 contents were investigated. It is found that TBAPF6 dramatically reduced the flammability of the electrolyte while slightly decreasing ionic conductivitiesconductivity. The electrochemistry electrochemical performances of graphite half cells with higher content of TBAPF6 showed poor compatibility between TBAPF6 additive and graphite anode due to the lack of stable SEI layer formation. But However, the LiCoO2/Graphite graphite full battery with 5% TBAPF6 showed good electrochemical performance and extraordinary thermal stability within 300 oC, representing demonstrating a good flame retardant additive of TBAPF6.

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