Faka, Vasiliki ; Agne, Matthias T. ; Till, Paul ; Bernges, Tim ; Sadowski, Marcel ; Gautam, Ajay ; Albe, Karsten ; Zeier, Wolfgang G. (2023)
Pressure dependence of ionic conductivity in site disordered lithium superionic argyrodite Li₆PS₅Br.
In: Energy Advances, 2 (11)
doi: 10.1039/D3YA00424D
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The understanding of transport in Li+ solid ionic conductors is critical for the development of solid-state batteries. The influence of activation volumes on ion transport in solid electrolytes has recently garnered renewed research interest, due to the need to control the ion dynamics that influence the ionic conductivity in solid electrolytes. Microscopic activation volumes are believed to correspond to the volume change in the atomic structure of a material that occurs during an ion jump and can be determined thermodynamically from pressure dependent conductivity measurements. However, it remains unknown if and how this external pressure can affect the structure and transport properties of Li+ solid electrolytes. The lithium argyrodites Li6PS5Br have shown high ionic conductivities, influenced by their Br−/S2− site disorder, which is associated with more spatially diffuse lithium-ion distributions. Herein, impedance spectra were acquired over a pressure range of 0.1 GPa to 1.5 GPa and revealed the activation volumes for Li+ migration. Specifically, activation volumes for Li+ migration increase with increasing degrees of Br−/S2− site disorder in Li6PS5Br and with more spatially distributed lithium-ions. Furthermore, estimations of the corresponding migration volumes, which are thought to be a constant of the diffusing mobile ion in the structure are here found to change significantly among different Br−/S2− site disorders. These observations motivate further investigations on how the thermodynamic activation volume in superionic Li+ conductors may provide novel insights to the influences of structure on ion transport in fast ionic conductors.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Faka, Vasiliki ; Agne, Matthias T. ; Till, Paul ; Bernges, Tim ; Sadowski, Marcel ; Gautam, Ajay ; Albe, Karsten ; Zeier, Wolfgang G. |
| Art des Eintrags: | Bibliographie |
| Titel: | Pressure dependence of ionic conductivity in site disordered lithium superionic argyrodite Li₆PS₅Br |
| Sprache: | Deutsch |
| Publikationsjahr: | 2023 |
| Ort: | Cambridge u.a. |
| Verlag: | Royal Society of Chemistry |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Energy Advances |
| Jahrgang/Volume einer Zeitschrift: | 2 |
| (Heft-)Nummer: | 11 |
| DOI: | 10.1039/D3YA00424D |
| Kurzbeschreibung (Abstract): | The understanding of transport in Li+ solid ionic conductors is critical for the development of solid-state batteries. The influence of activation volumes on ion transport in solid electrolytes has recently garnered renewed research interest, due to the need to control the ion dynamics that influence the ionic conductivity in solid electrolytes. Microscopic activation volumes are believed to correspond to the volume change in the atomic structure of a material that occurs during an ion jump and can be determined thermodynamically from pressure dependent conductivity measurements. However, it remains unknown if and how this external pressure can affect the structure and transport properties of Li+ solid electrolytes. The lithium argyrodites Li6PS5Br have shown high ionic conductivities, influenced by their Br−/S2− site disorder, which is associated with more spatially diffuse lithium-ion distributions. Herein, impedance spectra were acquired over a pressure range of 0.1 GPa to 1.5 GPa and revealed the activation volumes for Li+ migration. Specifically, activation volumes for Li+ migration increase with increasing degrees of Br−/S2− site disorder in Li6PS5Br and with more spatially distributed lithium-ions. Furthermore, estimations of the corresponding migration volumes, which are thought to be a constant of the diffusing mobile ion in the structure are here found to change significantly among different Br−/S2− site disorders. These observations motivate further investigations on how the thermodynamic activation volume in superionic Li+ conductors may provide novel insights to the influences of structure on ion transport in fast ionic conductors. |
| Freie Schlagworte: | Festbatt |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialmodellierung Zentrale Einrichtungen Zentrale Einrichtungen > Hochschulrechenzentrum (HRZ) Zentrale Einrichtungen > Hochschulrechenzentrum (HRZ) > Hochleistungsrechner |
| Hinterlegungsdatum: | 01 Mär 2024 11:00 |
| Letzte Änderung: | 01 Mär 2024 11:00 |
| PPN: | |
| Export: | |
| Suche nach Titel in: | TUfind oder in Google |
 |
Frage zum Eintrag |
Optionen (nur für Redakteure)
 |
Redaktionelle Details anzeigen |
Drucken
Impressum