An improved synthesis of fluorine-containing room temperature ionic liquids (FRTILs) is described. Twelve FRTILs are synthesized, in which the fluorinated cations based on N-methyl pyrrolidinium (MPy), 1-methly imidazolium (MIm) and diethylsulfide (DES) are associated with anions, such as dicyanamide (DCA) or bis(trifluoromethane sulfonyl)imide (TFSI). The molecular structures of these FRTILs were confirmed by FT-IR, ¹H-NMR, ¹³C-NMR and elemental analysis. The FRTILs have been investigated for their potential as electrolyte solvents, especially for lithium-sulfur (Li-S) batteries. Thermal behaviors were also studied by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) showing excellent thermal stability, exceeding 150 °C, for all FRTILs. Some of their physicochemical properties were determined, including density, flammability, viscosity, and miscibility with polar and nonpolar solvents. Due to the high viscosity of FRTILs, two low viscosity ILs (co-solvent thinners), [MImEt] [DCA] and [MImEt] [TFSI], have been synthesized and used to dilute the FRTILs. The resulting ternary electrolyte systems, LiTFSI in 1:1 wt.% FRTILs/thinner, were characterized by their ionic conductivity and electrochemical stability.

描述了一种改进的含氟室温离子液体（FRTILs）的合成。合成了十二种FRTIL，其中基于N-甲基吡咯烷鎓（MPy），1-甲基咪唑鎓（MIm）和二乙基硫化物（DES）的氟化阳离子与阴离子结合，例如双氰胺（DCA）或双（三氟甲烷磺酰基）酰亚胺（TFSI）。通过FT-IR，¹ H-NMR，¹³证实了这些FRTIL的分子结构。C-NMR和元素分析。已对FRTIL作为电解质溶剂的潜力进行了研究，尤其是锂硫（Li-S）电池。还通过热重分析（TGA）和差示扫描量热法（DSC）研究了所有FRTIL的优异热稳定性，超过150°C的热行为。确定了它们的一些物理化学性质，包括密度，易燃性，粘度以及与极性和非极性溶剂的混溶性。由于FRTIL的高粘度，已经合成了两种低粘度的IL（助溶剂稀释剂）[MImEt] [DCA]和[MImEt] [TFSI]，并用于稀释FRTIL。所得三元电解质体系LiTFSI的FRTILs /稀释剂为1：1 wt。％，其离子电导率和电化学稳定性为其特征。