Abstract
For the purpose of developing high‐performance glass‐ceramic superionic conductor, the controllable precipitation of LiTi2(PO4)3‐like superionic conducting phase in the Li2O–TiO2–P2O5 glass system was studied. Al with B or La co‐incorporated LiTi2(PO4)3‐based glass‐ceramics were prepared by the crystallization of the corresponding original glasses. Compared with the sole Al‐incorporated LiTi2(PO4)3‐based glass‐ceramics, the ionic conductivity shows an increase for the boron co‐incorporated one and a decrease for the lanthanum co‐incorporated one. Through the further in‐depth analysis based on the methods of DSC and X‐ray diffractive technique, this opposite change in ion conductivity was ascribed to the alterations of crystallization mechanism together with quantity of crystal phases within the glass‐ceramics.. The boron addition promoted the precipitation of LiTi2(PO4)3 phase and restrained the precipitation of second phase. The highest ionic conductivity 1.3 × 10−3 S/cm at 25°C was obtained through the heat treatment of B and Al co‐incorporated glassy samples at 900°C for 12 h. These inorganic solid electrolytes have a potential application in lithium batteries or other electrochemical ionic devices.
Published Version
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