The variation in the high temperature thermodynamic properties of the Li-Sb system with temperature (425-775 degrees C) and composition (x(Li) = 0.01-0.75) was determined by electromotive force (emf) measurements in a cell configured as follows: Li-Bi reference electrode (x(Bi) = 0.35) vertical bar eutectic of LiCl-KCl or LiCl-LiF vertical bar 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. (C) The Author(s) 2014. Published by ECS. All rights reserved.