FAST IONIC LITHIUM CONDUCTION IN SOLID LITHIUM NITRIDE CHLORIDE

Lithium nitride chloride (Li1.8N0.4Cl0.6) crystallizes in a defect anti-fluorite structure with 10% of the lithium sites being vacant. Its electrical conductivity and thermodynamic stability have been investigated in the temperature range from 25 to 400° C. Lithium ions are the predominant charge carriers, yielding a conductivity temperature product of σ T = 7.456 × 104 exp(-0.495 eV/kT) Ω-1 cm-K. The electronic contribution to the total conductivity is smaller by a factor of less than 10-4. The material is thermodynamically stable against pure metallic lithium and has a decomposition voltage larger than 2.5 V. © 1979.