High-temperature X-ray analysis of phase evolution in lithium ion conductor Li_(1.5)Al_(0.5)Ge_(1.5)(PO_4)_3

摘要

Series of Li_(1.5)Al_(0.5)Ge_(1.5)(PO_4)_3 glass ceramic samples were prepared in this work through the change of heat treatment temperature from 650 to 1050 °C. The structures of glass ceramic samples were characterized by means of high temperature X-ray diffraction and Field Emission Scanning Electron Microscope. And the lithium ionic conductivity was analyzed through AC impedance spectroscopy. Through heat treatment at 850 °C for 4 h for the base glass sample, we obtained a maximum conductivity of 5.8 × 10~(-4) S/cm at room temperature.