Deciphering Fast Ion Transport in Glasses: A Case Study of Sodium and Silver Vitreous Sulfides - Université du Littoral Côte d'Opale Accéder directement au contenu
Article Dans Une Revue Inorganic Chemistry Année : 2022

Deciphering Fast Ion Transport in Glasses: A Case Study of Sodium and Silver Vitreous Sulfides

Tinehinane Bounazef
  • Fonction : Auteur
  • PersonId : 1287106
Anton Sokolov
Maria Bokova
Alex Hannon
Igor Alekseev
  • Fonction : Auteur

Résumé

High-capacity solid-state batteries are promising future products for large-scale energy storage and conversion. Sodium fast ion conductors including glasses and glass ceramics are unparalleled materials for these applications. Rational design and tuning of advanced sodium sulfide electrolytes need a deep insight into the atomic structure and dynamics in relation with ion-transport properties. Using pulsed neutron diffraction and Raman spectroscopy supported by first-principles simulations, we show that preferential diffusion pathways in vitreous sodium and silver sulfides are related to isolated sulfur Siso, that is, the sulfur species surrounded exclusively by mobile cations with a typical stoichiometry of M/Siso ≈ 2. The Siso/Stot fraction appears to be a reliable descriptor of fast ion transport in glassy sulfide systems over a wide range of ionic conductivities and cation diffusivities. The Siso fraction increases with mobile cation content x, tetrahedral coordination of the network former and, in case of thiogermanate systems, with germanium disulfide metastability and partial disproportionation, GeS2 → GeS + S, leading to the formation of additional sulfur, transforming into Siso. A research strategy enabling to achieve extended and interconnected pathways based on isolated sulfur would lead to glassy electrolytes with superior ionic diffusion.
Fichier principal
Vignette du fichier
Deciphering_fast_ion_transport_in_glasses.pdf (5.54 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Licence : CC BY - Paternité

Dates et versions

hal-04217125 , version 1 (07-02-2024)

Identifiants

Citer

Mohammad Kassem, Tinehinane Bounazef, Anton Sokolov, Maria Bokova, Daniele Fontanari, et al.. Deciphering Fast Ion Transport in Glasses: A Case Study of Sodium and Silver Vitreous Sulfides. Inorganic Chemistry, 2022, 61 (32), pp.12870-12885. ⟨10.1021/acs.inorgchem.2c02142⟩. ⟨hal-04217125⟩

Collections

UNIV-LITTORAL LPCA
35 Consultations
6 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More