Abstract

The results of a.c. electrical conductivity measurements on Li 2SO 4 incorporating WO 2- 4 as guest ion in SO 2- 4 sublattice and on LiNaSO 4 incorporating SiO 4- 4 as guest ion in SO 2- 4 sublattice show convincingly that the anion-rotation “cogwheel” or “paddle-wheel” mechanism does not contribute to the high mobility of Li + in Li 2SO 4-based compounds. The enhanced conductivity observed at the higher frequency in the anion-doped compounds suggests relaxation effect and rigid network effect in the anion sublattice.

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