Famprikis, Theodosios ; Dawson, James A. ; Fauth, François ; Clemens, Oliver ; Suard, Emmanuelle ; Fleutot, Benoit ; Courty, Matthieu ; Chotard, Jean-Noël ; Islam, M. Saiful ; Masquelier, Christian (2019)
A New Superionic Plastic Polymorph of the Na+ Conductor Na3PS4.
In: ACS Materials Letters, 1 (6)
doi: 10.1021/acsmaterialslett.9b00322
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Na3PS4 is one of the most promising Na+ conductors, relevant for applications that can leverage its high ionic conductivity, such as solid-state batteries. Currently, two crystalline phases of the material have been identified, and it has been thought to melt above 500 °C. In contrast, based on diffraction, ab initio simulations, impedance spectroscopy, and thermal analysis, we show that Na3PS4 remains solid above this temperature and transforms to a third polymorph, γ, exhibiting fast-ion conduction and an orthorhombic crystal structure. We show that the fast Na+-conduction is associated with rotational motion of the thiophosphate polyanions pointing to a plastic crystal. These findings are of major importance for the development and understanding of new polyanion-based solid electrolytes.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2019 |
| Autor(en): | Famprikis, Theodosios ; Dawson, James A. ; Fauth, François ; Clemens, Oliver ; Suard, Emmanuelle ; Fleutot, Benoit ; Courty, Matthieu ; Chotard, Jean-Noël ; Islam, M. Saiful ; Masquelier, Christian |
| Art des Eintrags: | Bibliographie |
| Titel: | A New Superionic Plastic Polymorph of the Na+ Conductor Na3PS4 |
| Sprache: | Englisch |
| Publikationsjahr: | 30 Oktober 2019 |
| Verlag: | American Chemical Society |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | ACS Materials Letters |
| Jahrgang/Volume einer Zeitschrift: | 1 |
| (Heft-)Nummer: | 6 |
| DOI: | 10.1021/acsmaterialslett.9b00322 |
| URL / URN: | https://doi.org/10.1021/acsmaterialslett.9b00322 |
| Kurzbeschreibung (Abstract): | Na3PS4 is one of the most promising Na+ conductors, relevant for applications that can leverage its high ionic conductivity, such as solid-state batteries. Currently, two crystalline phases of the material have been identified, and it has been thought to melt above 500 °C. In contrast, based on diffraction, ab initio simulations, impedance spectroscopy, and thermal analysis, we show that Na3PS4 remains solid above this temperature and transforms to a third polymorph, γ, exhibiting fast-ion conduction and an orthorhombic crystal structure. We show that the fast Na+-conduction is associated with rotational motion of the thiophosphate polyanions pointing to a plastic crystal. These findings are of major importance for the development and understanding of new polyanion-based solid electrolytes. |
| Freie Schlagworte: | Plastics Thermodynamic modeling, Physical and chemical processes, Ionic conductivity, Phase transitions |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialdesign durch Synthese |
| Hinterlegungsdatum: | 19 Feb 2020 07:31 |
| Letzte Änderung: | 19 Feb 2020 07:31 |
| PPN: | |
| Projekte: | T.F. acknowledges the Alistore ERI and CNRS for their financial support in the form of a joint Ph.D. project between Amiens (France) and Bath (UK)., M.S.I. and J.A.D. acknowledge the EPSRC Programme Grant (No. EP/M009521/1) and the MCC-Archer consortium (No. EP/L000202/1). |
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