Multiple diffusion dynamics in superionic Argyrodites Ag8GeSe6
The crystalline-amorphous hybrid structures in superionic materials yield ultralow lattice thermal conductivity along with decent electrical and ion conductivities. They attract therefore intense interest from communities working on solid-sate battery, fuel cells, and thermoelectric applications. Recently, Ag-based Argyrodites, e.g., Ag8GeSe6 (our work), have moved into the focus of interest as potential thermoelectric materials. They show a T-independent (aka glass-like thermal transport) and ultralow thermal conductivity (¿_L) of ~0.3 W/m/K at room temperature. In spite of some studies on the correlation between lattice dynamics and ultralow ¿_L of Ag-based Argyrodites, the microscopic mechanisms of diffusive dynamics on their heat and ion transport is still missing. Notably, there is disagreement on whether Ag ions feature ultrafast or ultraslow diffusion. Hence, we intend to provide a direct experimental identification of Ag diffusion dynamics and bridge the interconnection between diffusion dynamics and ion/heat transport. Our study also provides an example to study atomic diffusion at different time-scales in superionic thermoelectric materials.
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The recommended format for citing this dataset in a research publication is in the following format:
Xingchen Shen; FOUQUET Peter; KOZA Michael Marek and WEBER Frank. (2023). Multiple diffusion dynamics in superionic Argyrodites Ag8GeSe6. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.7-03-223
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