Structure and ion transport behavior analysis of ionic liquid analogues based on magnesium chloride

A homogeneous, colorless ionic liquid analogue based on magnesium chloride and choline chloride is reported. The structure of the ionic liquid analogues is preliminarily investigated by FTIR. The main chemical groups are confirmed and the interactions between different chemical groups are analyzed. Thermal analysis shows that the ionic liquid analogue is stable from room temperature to 120 °C. The physical properties of the ionic liquid analogues such as viscosity, surface tension and conductivity are measured as function of temperature and compositions. The ion transport behaviors are analyzed using hole-theory. It is shown that the conductivity of the ionic liquid analogues is controlled by the ion mobility and the suitable voids.