Applications of ILs in Lithium-Ion Batteries

Exchange of common organic solvents by RTILs can enhance the safety of lithium-ion batteries. Since low viscosity is a major requirement for electrolytes. 

Preferred physicochemical properties, including low melting point, low viscosity, and high conductivity, are found for FSI-based RTILs when compared to those with TFSI anion [158]. A solution of 0.5 mol-kg LiTFSI in [PYRi3][TFSI] shows a conductivity of 0.88 mS cm and a viscosity of 157 mPa-s at 20 °C, while the values of LiTFSI in [PYRi3][FSI] are considerably better, that is, 1.12 mS-cm  

Lithium cell performance of electrolytes of 0.4 and 0.8 M LiTFSI in 1,2-diethyl-3,4-dimethylimidazolium bis(trifluoromethyIsulfonyI)imide ([DEDMI][TFSI]) with an IiCo02 cathode was investigated because of the enhanced cathodic stability of alkylated imidazolium salts [165]. The conductivities of 1.4 and 0.8 mS-cm of 0.4 

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