ABSTRACT

The solubility of lithium fluoride has so far never been studied in alkylcarbonate solvents. These data is essential to understand the behavior of this salt in solution, in particular in the field of lithium-ion batteries. The solubility of lithium fluoride (LiF) was measured at various temperatures in propylene carbonate (PC), ethylene carbonate (EC) and dimethyl carbonate (DMC) by atomic absorption spectroscopy. The LiF free enthalpy, enthalpy and entropy of dissolution in these solvents were deduced from the results. The solubility of LiF differs significantly with the nature of the solvent, EC being by far the most solubilizing media. The high solubilizing power of EC towards LiF cannot be explain by any of the physicochemical properties of the solvent, but by an entropy-driven phenomenon. The solubilities of LiF in water alkylcarbonates mixtures were determined by conductimetry at several temperatures leading to the corresponding LiF thermodynamic properties in these media. Results are discussed and compared to those obtained by atomic absorption measurements. Finally, a scheme representing the different stages for the dissolution of LiF in alkylcarbonates is proposed.

Compounds

#	Formula	Name
1	FLi	lithium fluoride
2	C4H6O3	4-methyl-1,3-dioxolan-2-one
3	C3H4O3	ethylene carbonate
4	C3H6O3	dimethyl carbonate
5	H2O	water

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	4 1	Mass concentration, kg/m3 ; Liquid mixture 1	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 1		Liquid mixture 1 Crystal - 1	Atomic absorption	1
POMD	2 1	Mass concentration, kg/m3 ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Crystal - 1	Atomic absorption	4
POMD	2 1	Molar enthalpy of solution, kJ/mol ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid Crystal - 1	Atomic Absorption	1
POMD	3 1	Mass concentration, kg/m3 ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Crystal - 1	Atomic absorption	4
POMD	3 1	Molar enthalpy of solution, kJ/mol ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid Crystal - 1	Atomic Absorption	1
POMD	5 1	Mass concentration, kg/m3 ; Liquid mixture 1	Temperature, K; Liquid mixture 1	Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Crystal - 1	Atomic absorption	4
POMD	5 1	Mass concentration, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid Crystal 1 - 1	Tomic absorption	1
POMD	5 1	Electrical conductivity, S/m ; Liquid mixture 1	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 1		Liquid mixture 1 Crystal - 1	Alternating current cell with electrodes	1
POMD	5 1	Molar enthalpy of solution, kJ/mol ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid Crystal - 1	Atomic Absorption	1
POMD	5 1	Amount concentration (molarity), mol/dm3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 1	SPECTR	7
POMD	2 5 1	Mass concentration, kg/m3 - 1 ; Liquid	Solvent: Volume fraction - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid Crystal 1 - 5	Tomic absorption	2
POMD	2 5 1	Electrical conductivity, S/m ; Liquid mixture 1	Solvent: Volume fraction - 2; Liquid mixture 1	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Crystal - 5	Alternating current cell with electrodes	2
POMD	2 5 1	Amount concentration (molarity), mol/dm3 - 1 ; Liquid	Temperature, K; Liquid Solvent: Volume fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 5	SPECTR	14
POMD	3 5 1	Mass concentration, kg/m3 - 1 ; Liquid	Solvent: Volume fraction - 3; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid Crystal 1 - 5	Tomic absorption	2
POMD	3 5 1	Electrical conductivity, S/m ; Liquid mixture 1	Solvent: Volume fraction - 3; Liquid mixture 1	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Crystal - 5	Alternating current cell with electrodes	2
POMD	3 5 1	Amount concentration (molarity), mol/dm3 - 1 ; Liquid	Temperature, K; Liquid Solvent: Volume fraction - 3; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 5	SPECTR	14
POMD	4 5 1	Mass concentration, kg/m3 - 1 ; Liquid	Solvent: Volume fraction - 4; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid Crystal 1 - 5	Tomic absorption	2
POMD	4 5 1	Electrical conductivity, S/m ; Liquid mixture 1	Solvent: Volume fraction - 4; Liquid mixture 1	Temperature, K; Liquid mixture 1 Pressure, kPa; Liquid mixture 1	Liquid mixture 1 Crystal - 5	Alternating current cell with electrodes	2
POMD	4 5 1	Amount concentration (molarity), mol/dm3 - 1 ; Liquid	Temperature, K; Liquid Solvent: Volume fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid Crystal - 5	SPECTR	14

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Thermodynamic of LiF dissolution in alkylcarbonates and some of their mixtures with water

Jones, J.[Jennifer], Anouti, M.[Meriem], Caillon-Caravanier, M.[Magaly], Willmann, P.[Patrick], Lemordant, D.[Daniel]

ABSTRACT