Performance of perovskite Li۳x-yLa۱-xAgyTi۱-yO۳ as solid electrolyte in lithium-ion batteries

Perovskite-type structured solid electrolytes with the general formula ( have been prepared by solidstate reaction. Their crystal structure and ionic conductivity were examined by means of ×-ray diffraction analysis (×RD), scanning electron microscope (SEM), Fourier Transform Infrared Spectroscopy (FT-IR) and alternating current (AC) impedance technique. All sintered compounds are isostructural with the parent compound LiLaTiO۳. Some impurity phase is detected at the grain boundary in the Ag substituted compounds. The substitution of partial Li+ by nobel material has responsibility for the cell volume expansion as determined by the ×RD data.the perovskite Li۳x-yLa۱-xTi۱yAgyO۳ (x=۵y/۶ , y=۰.۱۵) shows a remarkable ionic conductivity of ۱.۳×۱۰-۶ S/cm at room temperature (۲۰ °C)