Electrochemical Determination of the Thermodynamic Properties of Lithium-Antimony Alloys

The variation in the high temperature thermodynamic properties of the Li-Sb system with temperature (425–775ºC) and composition (xLi = 0.01–0.75) was determined by electromotive force (emf) measurements in a cell configured as follows: Li-Bi reference electrode (xBi = 0.35) | eutectic of LiCl-KCl or LiCl-LiF | Li-Sb alloy. On the basis of these data the Li-Sb couple was deemed attractive for storage of electrical energy in a liquid metal battery. In addition, an updated Li-Sb binary phase diagram is proposed.