Ionic conductivity of solid solutions of α-Li2SO4 with Li2WO4: Strong evidence for the paddle wheel mechanism of ion transport
Abstract Ionic conductivity of α-Li 2 SO 4 with up to 4 mol% Li 2 WO 4 has been measured using quartz capillary U-tubes and complex impedance technique. A significant drop in conductivity and increase in activation energy is observed for 2, 2.5, 3 and 3.5 mol% Li 2 WO 4 compositions while 4 mol% Li 2 WO 4 composition shows an increased conductivity. Based on a recent phase diagram of the binary system, the results are interpreted as convincing evidence for the “Paddle Wheel” mechanism of ion transport in α-Li 2 SO 4 .