HIGH IONIC-CONDUCTIVITY IN DENSIFIED POLYCRYSTALLINE LITHIUM NITRIDE

Pure polycrystalline Li3N pellets densified by sintering at elevated temperatures have been found to have a conductivity of 4 × 10-4 ohm-1 cm-1 at 25°C. The impedance of conductivity cells prepared from these pellets with lithium electrodes has been found to be essentially frequency independent. The d.c. conductivity was 2 × 10-4 ohm-1 cm-1 at 25°C. Its use in solid state batteries must allow for the fact that it reacts with cathode-active materials under moderate conditions. © 1979.