Solid electrolytes based on lithium-containing lanthanum metaniobates and metatantalates with defect-perovskite structure

The structure and transport properties of lithium-containing lanthanum metaniobates and metatantalates with defect-perovskite structure, La2/3−xLi3x□4/3−2xNb[Ta]2O6, have been studied. It has been shown that the materials under investigation possess a high lithium ion-conductivity