A new system of Lithium fast ion conductors based on LiTi2P3O12 and Pyrophyllite

Abstract

Pyrophyllite has been used as a starting material for the synthesis of Lithium fast ion conductors of the Li1+3xAlxTi2-xSi2xP3-2xO12 system by high temperature solid phase reaction. Most of the reactions completed at 1073-1423K. X-ray differaction analysis and an a.c. impedance technique were employed to characterize these fast ion conductors. The results showed that the lattice symmetry of most compositions in the system is R3c and the maximum ionic conductivity reaches upto the order of 10-2Scm -1 at 573K. The highest conductivity corresponds to the initial composition x = 0.15.