The effect of elemental substitution, in obtaining higher Li ion conductivities in perovskite-type oxides, was investigated for solid solutions of the form: La0.55Li0.35TiO3-KNb3, La0.55Li0.35TiO3-KTa3 and La0.55Li0.35-xKxTiO3. The results were explained in terms of the effects of lattice expansion, site percolation and local lattice distortion.

T.Katsumata, Y.Matsui, Y.Inaguma, M.Itoh: Solid State Ionics, 1996, 86-88[1], 165-9