“…While some techniques, such as (pulsed or static) field gradient NMR, ,− can probe macroscopic, that is, tracer diffusion coefficients, others, such as high-resolution 1D or 2D exchange NMR, are sensitive to site-specific Li + hopping processes. − ,− Time-domain NMR methods, ,, including especially spin–lattice relaxation techniques, ,, probe short- and long-range ion dynamics, depending on the temperature range used to sample the diffusion-induced relaxation rates. Here, we used a set of model compounds of the Li 4 MCh 4 (M = Sn, Ge; Ch = S, Se) family , to apply so-called stimulated echo NMR to probe long-range Li + ion dynamics. In general, stimulated echo NMR is sensitive to extremely slow dynamic processes; − thus, it can measure jump rates with values in the kilohertz to sub-hertz range .…”