It was found that the doping of pure LiI or LiBr by homovalent substitution led to an increase in the conductivity. This enhancement was most marked in solid solutions (LiBr content less than 15 or greater than 90mol%) close to the pure compounds. The highest conductivity (5 x 10-7S/cm at 293K) was exhibited by the 2-phase composition, LiI0.75Br0.25. The conductivity obeyed an Arrhenius behavior, and it was concluded that the variations in conductivity were related to those of the activation energy. The minimum value of the latter was 8.7kcal/mol.

R.Mercier, M.Tachez, J.P.Malugani, G.Robert: Solid State Ionics, 1985, 15[2], 109-12