Preparation of Nanostructured Li1.4Al0.4Ti1.6(PO4)3 Glass-Ceramics by a Citrate Process

Abstract A Li1.4Al0.4Ti1.6(PO4)3 gel was successfully prepared by a citrate process and converted into nanostructured and highly Li+-conductive Li1.4Al0.4Ti1.6(PO4)3 glass-ceramics through heat treatment at 700–900 °C. The experimental results indicated that the Li-ion conductivity of the glass-ceramics depended greatly on the grain size of the conducting phase in the specimens. An excellent room-temperature conductivity as high as 1.36 × 10−3 S cm−1 was obtained, which is one of the highest lithium-ion conductivity for solid electrolytes.