Carbonate-based organic electrolytes with lower flash points are widely used in commercial lithium-ion batteries, boosting the development of energy storage system. Safety problems, arising from the combustion and explosion caused by carbonate-based organic electrolytes, have become one of the bottlenecks restricting large-scale application of lithium-ion batteries. In this work, flame-retardant or non-combustible electrolyte systems were investigated. Because of the excellent flame retardancy, low flammability, and high conductivity, thermal, and electrochemical stability, 1-butyl-3-menthylimidazolium-hexafluorophosphate ([Bmim]PF₆) was used to generate imidazolium ionic liquids based electrolytes. The flame retardant and electrochemical performances of [Bmim]PF₆-based binary electrolytes with different ionic liquid ratios, and the comparison with commercial carbonate electrolytes (CEs) were characterized. Results show that compared with commercial carbonate solvent electrolytes, battery performances, such as thermal safety and electrochemical stability of the proposed [Bmim]PF₆ binary electrolyte, are superior to that of CEs when they are used in LiFePO₄ electrode batteries. The binary electrolyte with 5% of [Bmim]PF₆ ionic liquid possesses the best comprehensive performance. Explicitly speaking, the ionic conductivity and combustibility of the binary electrolyte are higher and significantly lower than that of CEs, respectively, thus the significantly improving the conductivity and thermal stability. Furthermore, since the battery's discharge capacity and capacity retention rate using the binary electrolyte after 100 cycles of charge and discharge at 1 C charge-discharge rate are higher than those using CEs, the [Bmim]PF₆ binary electrolyte also shows good electrochemical stability.

闪点较低的碳酸盐基有机电解质广泛应用于商用锂离子电池，推动了储能系统的发展。碳酸盐基有机电解质因燃烧和爆炸引起的安全问题已成为制约锂离子电池大规模应用的瓶颈之一。在这项工作中，研究了阻燃或不可燃的电解质系统。1-丁基-3-薄荷基咪唑鎓-六氟磷酸盐（[Bmim]PF ₆）具有优异的阻燃性、低可燃性、高导电性、热稳定性和电化学稳定性，可用于制备咪唑鎓离子液体基电解质。_{[Bmim]PF 6}的阻燃和电化学性能表征了具有不同离子液体比例的二元电解质，并与商业碳酸盐电解质（CEs）进行了比较。_{结果表明，与商业碳酸盐溶剂电解质相比，所提出的[Bmim]PF 6}二元电解质的电池性能，如热安全性和电化学稳定性，在用于LiFePO ₄电极电池时优于CEs 。_{含 5% [Bmim]PF 6}的二元电解质离子液体综合性能最好。明确地说，二元电解质的离子电导率和可燃性分别高于和显着低于 CEs，从而显着提高了电导率和热稳定性。此外，由于使用二元电解液的电池在1 C充放电率下100次充放电循环后的放电容量和容量保持率均高于使用CEs的电池，因此[Bmim]PF ₆二元电解液也表现出良好的电化学稳定性。