Origin of the low grain boundary conductivity in lithium ion conducting perovskites: Li3xLa0.67−xTiO3

Abstract

Although the bulk conductivity of lithium ion conducting Li_3xLa_0.67−xTiO₃ electrolytes reaches the level of 10⁻³ S cm⁻¹, the grain boundary conductivity is orders of magnitude lower; the origin of the low grain boundary conductivity should be thoroughly understood as a prerequisite to improve the overall conductivity.