Although ionic liquids possess desirable features as electrolyte components , further developments have been hindered by their high viscosity which induces low wettability of the electrode surface and low ionic conductivity. The most recent strategy employed to overcome this problem has been the use of electrolytes based on mixtures of ILs and organic electrolytes . An appropriate selection of the type of ILs, solvent(s) and lithium salt, as well as the ratio between these components, makes possible the realization of electrolytes with optimized properties. For these reasons, the use of IL/carbonate mixtures has become a popular and a viable strategy. Guerfi et al. have investigated the electrochemical performance of mixtures containing 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl) imide [TFSI], ethylene carbonate (EC), diethyl carbonate (DEC) and LiPF 6 as lithium salt and found an optimum range of conductivity and viscosity for electrolytes containing 30-40% of ILs in the organic solvents. The electrochemical performance containing these mixtures was found to be comparable to that of conventional systems, with an extra advantage of improved safety. Wang et al. investigated the use of [TFSI] ILs in combination with propylene carbonate (PC), and found that these types of mixtures showed enhanced electrochemical features for use in LIBs . More recently, Wilken et al. reported a detailed study about the influence of the amount of ILs on the viscosity, conductivity and flammability of mixtures containing [TFSI], EC, DEC, lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) and lithium hexafluorophosphate (LiPF 6 ) lithium salts . Furthermore, mixtures containing N-alkyl-N-methyl-pyrolidinium bis(trifluoromethanesulfonyl) imide [TFSI], PC and LiTFSI have also been investigated . It has been shown that these mixtures have had enhanced conductivities, low viscosities, and overall stability windows of more than 5 V. A mixture containing 80 wt% ILs (flash point of 153°C) was found to be non-flammable with the extra advantage of reducing the kinetics of PC evaporation as well as the anodic dissolution of aluminum .