New LiGePS Structure Ordering and Li-Ion Dynamics Unveiled in LiGeS-LiPS Superionic Conductors: A Solid-State Nuclear Magnetic Resonance Study.

The fast Li-ion pathways in crystals contribute to superionic conductivity-extraordinarily high ionic conductivity-of the LiGePS (LGPS) structure. Composition tuning is expected to improve the conductivity. The phase behavior, microstructure, and ion dynamics of a series of solid solutions of LiGeS-LiPS (4/1 ≥ / ≥ 1/2) were studied by multiple Li and P solid-state NMR methods.