Synthesis and characterization of LATP solid electrolyte by solution method

Recently, considerable attention has been paid to the study of solid electrolytes in lithium-ion batteries. Ion conductive ceramic material NASICON-type Li₁ +xA_l xTi₂ -x(PO₄)₃ (LATP) is a promising solid electrolyte for lithium-ion batteries due to its stability in air. In this work successfully produced pure solid electrolyte LATP powders with a rhombohedral NASICON-type structure. Here we report the results of LATP synthesis using the solution method. Pellets of dense electrolyte were made at 900 °C. It has been found that the ionic conductivity of LATP is largely influenced by the preparation method. Pure LATP was obtained with the grain size of 100-700 nm. These findings demonstrate the efficacy of the solution method in producing pure LATP. The resultant LATP has an activation energy of 0.465 eV and a total lithium-ion conductivity of 5.8×10^-5 S cm-1 at ambient temperature. Its typical particle size is between 100 and 700 nm, and its relative density is 89.5 percent.