Characterization of (La, Li)TiO3 Ceramics for Lithium Ion Micro-batteries synthesized with Amorphous Spheres

Abstract

Lithium ionic conductor, (La,Li)TiO₃ ceramics (LLTO), was synthesized by sintering La₂O₃-Li₂O-TiO₂ amorphous spheres at various temperatures. Single crystalline LLTO ceramics required calcination at 700°C and sintering at temperatures higher than 1200°C because of decomposition of La₂CO₅. Lithium ionic conductivity of LLTO ceramics derived from the amorphous spheres showed 4.0 ×10^-3 S cm^-1 at room temperature. In addition, Li₄Ti₅O₁₂ particles were obtained by firing Li₂O-TiO₂ amorphous spheres at 800°C for 1 min in air. Both LLTO and LTO spheres prepared with amorphous spheres can be applied to all-solid-state lithium micro-batteries.