CHARACTERISATION OF Li1+xTi2-xAlx (PO4)3 (LTAP) NASICON CERAMICS FOR FOR IONIC CONDUCTIVITY OF SOLID ELECTROLYTES

Abstract

Li1+xTi2-xAlx(PO4)3 (LTAP) are promising solid electrolytes for Li-ion batteries and suitable to be used in the area that reaquires high energy density as well as rechargeable power sources. In this work, the LTAP samples are synthesised using inexpensive reagents namely Li2CO3, TiO2, Al2O3 and NH4H2PO4 via conventional solid-state reaction route. The highest bulk conductivity value of LTAP sample is found to be ~10-4 S cm-1. This conductivity behaviour is enhanced when the sample was doped with aluminium, x = 0.2 and sintered at 900°C for 8h. The XRD analysis revealed that the crystalline phase of this sample is dominated by Li1.2Ti1.8Al0.2(PO4)3 and some impurities. Overall the trends of the data are inline with the literature and can be suggested for the Li-ion battery application.