Nuclear magnetic resonance investigations of lithium diffusion in Li2O, Li2SiO3 and LiAlO2

Abstract

Spin–lattice relaxation rates of ⁷Li have been measured for Li₂O, Li₂SiO₃ and LiAlO₂ with pulsed nuclear magnetic resonance. Relaxation due to cation diffusion is observed with quadrupole and dipole interactions. Cation jump frequencies in the extrinsic region with apparent activation energies of ca. 0.4 eV for Li₂O, 0.81 eV for Li₂SiO₃ and 0.77 eV for LiAlO₂ are obtained. These activation energies are in good agreement with those of ionic conductivities in the extrinsic region.