Ionic-electronic mixed conduction in Li xV 2O 5

Abstract

The dc conductivity of lithium vanadium bronze, Li x V 2O 5 was measured on polycrystal prepared by solid-state reaction in the x region 0.25–0.70. Both electronic and ionic conduction was observed. The former increased with increase of lithium content and was nearly equal to the total conductivity 10 -1–10 0 S/cm. The ionic conductivity (∽10 -4 S/cm) measured by dc four-probe technique decreased as the lithium content increased in the range 400–500°C. The apparent activation energy for ionic conduction varied from 57 kJ/mol for x of 0.25 to 82 kJ/mol for x of 0.50.