Effect of the A-Site Substitution on the Structure Peculiarities and Ionic Conductivity of Solid Electrolytes La2/3-x-yLi3x-ySr2y24/3-2xNb2O6

The effect of aliovalent substitution in the perovskite A-sublattice by Sr+2 ions on the structure peculiarities and ion transport in La2/3-x-yLi3x-ySr2y24/3-2xNb2O6 (2-vacancy) has been studied. The peculiarities of phase formation in the systems studied are considered. The homogeneity region of Sr-containing solid solutions has been determined. It has been shown that the substitution of Sr+2 for (La+3+Li+) leads to an increase in perovskite lattice VOLUe. The transport properties of Sr-containing lithium-conducting materials have been studied. It has been shown that substitution by larger ions contributes to higher ionic conductivity in the materials investigated.