Tetrabutylammonium Hexafluorophosphate as Flame Retardant Additive for Lithium Ion Batteries

doi:10.13208/j.electrochem.160419

Abstract

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.

CLC Number:

TM912
O646

ZHAO Qing, ZHANG Qian, FAN Jing-min, ZHENG Ming-sen, DONG Quan-feng. Tetrabutylammonium Hexafluorophosphate as Flame Retardant Additive for Lithium Ion Batteries[J]. Journal of Electrochemistry, 2017, 23(4): 435-440.

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