Thermo-physical properties, excess and deviation properties for a mixture of γ-butyrolactone with diethyl carbonate or propylene carbonate

The paper reports the thermodynamic and transport properties of the materials that are used in liquid electrolytes of lithium ion batteries (LIBs). Linear and cyclic carbonates are commonly used solvents for organic electrolyte solutions. On the other hand, γ-butyrolactone (GBL) could also be an attractive solvent because it has sufficiently high permittivity to dissociate lithium salts. This prompted us to investigate the thermo-physical properties such as the density, refractive index, kinematic viscosity (298.2 to 328.2 K) and the excess and deviation properties (298.2 to 318.2 K) for a mixture of GBL and diethyl carbonate (DEC) or propylene carbonate (PC). The thermo-physical properties, i.e., the density, refractive index, and kinematic viscosity, were correlated by employing DIPPR, and linear and Goletz/Tassion equations, respectively. The excess and deviation properties were computed and modeled by the polynomial Redlich-Kister equations for each of the binary fractions.