Studying Li dynamics in a gas-phase synthesized amorphous oxide by NMR and impedance spectroscopy

Viktor Epp, Christian Brünig, Michael Binnewies, Paul Heitjans & Martin Wilkening
Li diffusion parameters of a structurally disordered Li-Al-Si-oxide prepared by gas-phase synthesis were complementarily investigated by both time-domain NMR techniques and impedance spectroscopy. The first include 7Li NMR spin-lattice relaxation (SLR) measurements in the laboratory as well as in the rotating frame of reference. An analysis of variable-temperature NMR line widths point to an activation energy E a of approximately 0.6 eV. The value is confirmed by rotating-frame SLR NMR data recorded at approximately 11...
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