From ultraslow to fast lithium diffusion in the 2D ion conductor Li0.7TiS2 probed directly by stimulated-echo NMR and nuclear magnetic relaxation

M. Wilkening*, W. Küchler, P. Heitjans

*Korrespondierende/r Autor/in für diese Arbeit

Publikation: Beitrag in einer FachzeitschriftArtikel

Abstract

Li7 stimulated-echo NMR and classical relaxation NMR techniques are jointly used for the first time for a comprehensive investigation of Li diffusion in layer-structured Li0.7TiS2. One single 2D Li diffusion process was probed over a dynamic range of almost 10 orders of magnitude. So far, this is the largest dynamic range being measured by Li7 NMR spectroscopy directly, i.e., without the help of a specific theoretical model. The jump rates obey a strict Arrhenius law, determined by an activation energy of 0.41(1)eV and a preexponential factor of 6.3(1)×1012s-1, and range between 1×10-1s-1 and 7.8×108s-1 (148-510K). Ultraslow Li jumps in the kHz to sub-Hz range were measured directly by recording Li7 spin-alignment correlation functions. The temperature and, in particular, the frequency dependence of the relaxation rates fully agree with results expected for 2D diffusion.

Originalspracheenglisch
Aufsatznummer065901
FachzeitschriftPhysical Review Letters
Jahrgang97
Ausgabenummer6
DOIs
PublikationsstatusVeröffentlicht - 17 Aug 2006

ASJC Scopus subject areas

  • !!Physics and Astronomy(all)

Fingerprint Untersuchen Sie die Forschungsthemen von „From ultraslow to fast lithium diffusion in the 2D ion conductor Li0.7TiS2 probed directly by stimulated-echo NMR and nuclear magnetic relaxation“. Zusammen bilden sie einen einzigartigen Fingerprint.

  • Dieses zitieren