Solubility, ionic conductivity and viscosity of lithium salts in room temperature ionic liquids

Solubility of inorganic salts in pure ionic liquids

“…To the best of our knowledge, research merging ILs and ISs has mainly focused on developing systems for batteries, and, as a result, the characterization of their structure and physical properties have concentrated on mixtures based on the bistriflamide anion [13][14][15][16][17][18][19][20][21]. The earliest of these studies, 1994, was performed by Wilkes et al and focused on the physical properties, solid-liquid equilibria and X-ray analysis of chloroaluminate-based ILs with distinct ISs [20,21].…”

Composition as a Means To Control Morphology and Properties of Epoxy Based Dual-Phase Structural Electrolytes

“…The ionic conductivity increases with increasing temperature in a non-linear fashion, following the traditional polymer electrolyte VTF behavior and thus suggesting that the ion transport is coupled to the relaxation dynamics of the matrix. The decrease in ionic conductivity with increasing LiTFSI concentration was expected due to the increase in viscosity of the electrolyte, reduction of the mobility of the carrier ions, the increased aggregation of charge carriers, 48,50,54 as well as the reduced microstructural length scale, which all may alter the transport properties. Although the microstructure must also contribute, the increase in storage modulus determined from the DMTA experiments (0.31 GPa at 2.3 mol/l LiTSFI to 0.89 GPa at 4.6 mol/l) could indicate an increased crosslink density and reduced chain mobility.…”

“…[48][49][50] Nevertheless, here, the presence of LiTFSI is essential, as it allows the formation of macroscopically homogeneous samples. In the absence of LiTFSI, macroscopically homogeneous samples were only obtained at high epoxy resin contents (>70 -complexes ( Figure 6).…”

Formation of Complexes in RTIL and Ion Separations

“…Inorganic salts usually have poor solubility in both hydrophobic and hydrophilic RTILs at a level of 0.05-0.005 mol/dm 3 (Yan et al, 2010;Seddon et al, 2000;Rosol et al, 2009;Djigailo, 2010), although in some cases (LiClO 4 in [BMIM][SCN]) it may exceed 4 mol/dm 3 at ambient temperature (Rosol et al, 2009). Thus for a successive extraction of cations from aqueous solution into a hydrophobic RTIL some complexing agents are required (Cocalia et al, 2006a;Visser et al, 2000) as well as in the case of conventional organic solvents.…”

“…Among the most promising fields the RTIL-based lithium batteries (Lewandowski & SwiderskaMocek, 2009;Rosol et al, 2009) and recent applications of ionic liquids in the separation technology (Dundan & Kyung, 2010;Dietz, 2006) can be considered as a "hot" research topic. The present review is therefore focused on the role of cation complexes in RTIL-based metal ion separations, while the other important aspects of inorganic salt behaviour in RTILs are excellently summarised in another chapter of this book (Nockemann, 2011).…”