Realizing long-cycling all-solid-state Li-In||TiS batteries using LiMAsSI (M=Si, Sn) sulfide solid electrolytes.

Inorganic sulfide solid-state electrolytes, especially LiPSX (X = Cl, Br, I), are considered viable materials for developing all-solid-state batteries because of their high ionic conductivity and low cost. However, this class of solid-state electrolytes suffers from structural and chemical instability in humid air environments and a lack of compatibility with layered oxide positive electrode active materials. To circumvent these issues, here, we propose LiMAsSI (M=Si, Sn) as sulfide solid electrolytes.

Diameter-dependent ultrafast lithium-ion transport in carbon nanotubes.

Ion transport in solids is a key topic in solid-state ionics. It is critical but challenging to understand the relationship between material structures and ion transport. Nanochannels in crystals provide ion transport pathways, which are responsible for the fast ion transport in fast lithium (Li)-ion conductors.