Co-Precipitation Synthesis and Electrochemical Properties of NASICON-Type Li1.3Al0.3Ti1.7(PO4)3 Solid Electrolytes

NASICON-type solid-state electrolytes have gathered wide attention to meet the requirements of high-energy-density batteries. In this study, Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP) were synthesized through co-precipitation method. The composition, phase transformation, microstructure and particle size of LATP powder were characterized in detail. Pure LATP without any detectable secondary phases can be obtained at 800 ℃ with size about 590 nm. The relatively dense surface microstructure for LATP ceramics was clearly observed. In addition, the ionic conductivities of LATP pellets increased at first and then decreased with the increased sintering temperature and time. Owing to the highest relative density (95.6%), LATP (sintered at 900 ℃ for 6h, LATP-900 6 ) exhibited a highest total conductivity of 2.19×10 − 4 S/cm with a low activation energy of 0.32 eV. The results suggest that co-precipitation synthesized LATP-900 6 ceramic electrolyte could be a promising alternative towards achieve a safe solid-state battery. Moreover, the co-precipitation method is suitable for the preparation of other oxide ceramic electrolytes.