IONIC CONDUCTIVITIES AND STRUCTURE OF LITHIUM PHOSPHORUS OXYNITRIDE GLASSES

Lithium phosphorus oxynitride glasses with different lithium contents have been prepared by melting base glasses at high temperature in a fl owing ammonia atmosphere for 16-72 h. The melt was then furnace-cooled to room temperature to avoid bubble formation in the sample. The stru cture of the lithium phosphorus oxynitride glasses was probed by X-ray photoelectron spectroscopy and high performance liquid chromatography . The results of ac impedance measurements show that nitrogen incorpor ation into the glass structure increases the ionic conductivity. The h ighest conductivity was found in Li0.99PO2.55N0.30 glass with sigma si milar to 3.0 X 10(-7) S cm(-1) at 25 degrees C and E(a) = 0.60 eV.