High magnesium mobility in ternary spinel chalcogenides. Origin of fast ion diffusion in super-ionic conductors. Opening diffusion pathways through site disorder: the interplay of local structure and ion dynamics in the solid electrolyte Li 6+ xP 1– xGe xS 5I as probed by neutron diffraction and NMR. Bottleneck of diffusion and inductive effects in Li 10Ge 1– xSn xP 2S 12. Inorganic solid-state electrolytes for lithium batteries: mechanisms and properties governing ion conduction. Ion hopping: design principles for strategies to improve ionic conductivity for inorganic solid electrolytes. Mechanisms and properties of ion-transport in inorganic solid electrolytes. Fundamentals of inorganic solid-state electrolytes for batteries. Heat capacity of liquids: an approach from the solid phase.

Liquid-like thermal conduction in intercalated layered crystalline solids. High thermoelectric performance of superionic argyrodite compound Ag 8SnSe 6. Part-crystalline part-liquid state and rattling-like thermal damping in materials with chemical-bond hierarchy. Anharmonic lattice dynamics and superionic transition in AgCrSe 2.

Hopping time scales and the phonon-liquid electron-crystal picture in thermoelectric copper selenide. Selective breakdown of phonon quasiparticles across superionic transition in CuCrSe 2. Crystal structure induced ultralow lattice thermal conductivity in thermoelectric Ag 9AlSe 6. Recent advances in liquid‐like thermoelectric materials. High thermoelectric performance of Ag 9GaSe 6 enabled by low cutoff frequency of acoustic phonons. Exploiting the paddle-wheel mechanism for the design of fast ion conductors. Our results provide fundamental insights into the complex atomic dynamics in superionic materials for energy conversion and storage. Rather, a striking thermal broadening of low-energy phonons, starting even below 50 K, reveals extreme phonon anharmonicity and weak bonding as underlying features of the potential energy surface responsible for the ultralow thermal conductivity (<0.5 W m −1 K −1) and fast diffusion. Concomitantly, the persistence of long-wavelength transverse acoustic phonons across the superionic transition challenges a proposed ‘liquid-like thermal conduction’ picture. We identify a critical interplay of the vibrational dynamics of mobile Ag and a host framework that controls the overdamping of low-energy Ag-dominated phonons into a quasi-elastic response, enabling superionicity. Here we investigate ionic diffusion and lattice dynamics in argyrodite Ag 8SnSe 6 using synchrotron X-ray and neutron scattering techniques along with machine-learned molecular dynamics. Yet the correlation and interdependence between these two features remain unclear owing to a limited understanding of their complex atomic dynamics. Ultralow thermal conductivity and fast ionic diffusion endow superionic materials with excellent performance both as thermoelectric converters and as solid-state electrolytes.

Extreme phonon anharmonicity underpins superionic diffusion and ultralow thermal conductivity in argyrodite Ag 8SnSe 6

Liquid crystal display ion bonding