The ionic conductivity and chemical diffusion of cations and holes in LixCu2-xS (x = 0 to 0.25) were studied at 623 to 467K. In accord with the so-called mixed mobile ions effect, the partial substitution of Cu by Li in the sulfide led to a decrease in the ionic conductivity. This was linked to an increase in the activation energy for ionic conductivity. When compared with the pure sulfide, the chemical diffusion coefficients in Li-containing compounds were found to be smaller. The observed values of the activation energies for chemical diffusion were close to the activation energy for ionic conductivity.

Ionic Conductivity and Chemical Diffusion in Superionic LixCu2-xS (0 ≤ x≤ 0.25). M.K.Balapanov, I.G.Gafurov, U.K.Mukhamedyanov, R.A.Yakshibaev, R.K.Ishembetov: Physica Status Solidi B, 2004, 241[1], 114-9