Insights into the Rich Polymorphism of the Na+ Ion Conductor Na3PS4 from the Perspective of Variable-Temperature Diffraction and Spectroscopy
Journal Article
·
· Chemistry of Materials
- Univ. de Picardie Jules Verne, Amiens (France). Lab. de Réactivité et Chimie des Solides (LRCS); University of Bath (United Kingdom); ALISTORE European Research Inst., Amiens (France); Réseau sur le Stockage Électrochimique de l’Énergie (RS2E), Amiens (France)
- Univ. de Picardie Jules Verne, Amiens (France). Lab. de Physique de la Matière Condensée (LPMC)
- National Univ. of Singapore (Singapore)
- Institut Laue-Langevin (ILL), Grenoble (France)
- Newcastle Univ., Newcastle upon Tyne (United Kingdom); Newcastle Univ., Newcastle upon Tyne (United Kingdom). Centre for Energy
- CELLS—ALBA Synchrotron, ILL, Barcelona (Spain)
- Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Rutherford Appleton Lab., ISIS Neutron Source
- Sorbonne Univ., Paris (France). Physico-Chimie des Electrolytes et Nano-systèmes Interfaciaux (PHENIX); Réseau sur le Stockage Électrochimique de l’Énergie (RS2E), Amiens (France)
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Univ. de Picardie Jules Verne, Amiens (France). Lab. de Réactivité et Chimie des Solides (LRCS); Réseau sur le Stockage Électrochimique de l’Énergie (RS2E), Amiens (France)
- Univ. of Stuttgart (Germany). Inst. of Materials Science,
- University of Bath (United Kingdom); ALISTORE European Research Inst., Amiens (France)
Solid electrolytes are crucial for next-generation solid-state batteries, and Na3PS4 is one of the most promising Na+ conductors for such applications, despite outstanding questions regarding its structural polymorphs. In this contribution, we present a detailed investigation of the evolution in structure and dynamics of Na3PS4 over a wide temperature range 30 < TT < 500 °C, which we attribute to dynamic local tetragonal distortions. The first-order phase transition to the mesophasic high-temperature polymorph (γ, Fddd) is associated with a sharp volume increase and the onset of liquid-like dynamics for sodium-cations (translational) and thiophosphate-polyanions (rotational) evident by inelastic neutron and Raman spectroscopies, as well as pair-distribution function and molecular dynamics analyses. Overall, these results shed light on the rich polymorphism of Na3PS4 and are relevant for a range host of high-performance materials deriving from the Na3PS4 structural archetype.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- Engineering and Physical Sciences Research Council (EPSRC); National Research Foundation (NRF) Singapore; Newcastle University; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1833596
- Journal Information:
- Chemistry of Materials, Journal Name: Chemistry of Materials Journal Issue: 14 Vol. 33; ISSN 0897-4756
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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