Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

ABSTRACT

Solubilities were measured from 25 to 45 C for six lithium salts (LiF, LiCl, LiBr, LiNO3, LiTFSI and LiPF6) in five pure noneaqueous solvents (ethanol, acetonitrile, dimethyl carbonate, dimethyl sulfoxide and propylene carbonate) and in a few of their binary mixtures (ethanol + DMSO, DMC + DMSO and DMC + PC). The experimental method uses a Varian inductively--coupled plasma--optical--emission spectrometer (ICP--OES). Solubilities increase with rising temperature. At a given temperature, LiNO3 shows the highest solubility in all solvents. Salt solubilities follow the order LiNO3 greater than LiTFSI greater than LiBr greater than LiCl greater than LiPF6 greater than LiF. The dissolving abilities of the solvents are in the order ethanol greater than DMSO greater than acetonitrile greater than PC greater than DMC. Coupled with the salt's melting temperature and enthalpy of fusion, liquid--phase activity coefficients for salts were obtained from the solubility data.