Titre :

A significant enhancement of sodium ion conductivity in phosphate glasses by addition of WO3 and MoO3: the effect of mixed conventional–conditional glass-forming oxides

Auteur(s) :

Renka, Sanja [Auteur]
Rudjer Boskovic Institute [Zagreb]
Pavić, Luka [Auteur]
Institut Ruđer Bošković [IRB]
Tricot, Gregory [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Mošner, Petr [Auteur]
Department of General and Inorganic Chemistry [University of Pardubice]
Koudelka, Ladislav [Auteur]
Department of General and Inorganic Chemistry [University of Pardubice]
Moguš-Milanković, Andrea [Auteur]
Rudjer Boskovic Institute [Zagreb]
Šantić, Ana [Auteur]
Rudjer Boskovic Institute [Zagreb]

Titre de la revue :

Physical Chemistry Chemical Physics

Numéro :

23

Pagination :

9761-9772

Date de publication :

2021

Discipline(s) HAL :

Chimie

Résumé en anglais : [en]

Ion conducting oxide glasses are attractive materials for application in various electrochemical devices and an understanding of the structure–transport properties relationship is crucial for their development. An interesting ...
Lire la suite >Ion conducting oxide glasses are attractive materials for application in various electrochemical devices and an understanding of the structure–transport properties relationship is crucial for their development. An interesting effect of glass structure on the dynamics of mobile ions is the mixed glass-former effect which causes a non-linear change of ionic conductivity when glass-forming oxides get gradually substituted. Here, we report a strong, positive effect of structural changes on the conductivity of sodium ions in two glass systems 40Na2O–xMoO3–(60−x)P2O5 and 40Na2O–xWO3–(60−x)P2O5; x = 0–50 mol% where a conventional glass-forming oxide (P2O5) is gradually replaced by WO3/MoO3 which are conditional ones. In both glass systems, the compositional change in DC conductivity is non-linear, with the maximal increase of four orders of magnitude in the case of WO3 and three orders of magnitude in the case of MoO3. This significant enhancement of ionic conductivity is related to the formation of mixed phosphate–tungstate and phosphate–molybdate units in the glass network. The facilitating effect of these structural units on sodium ion dynamics is also observed in the changes of the shape of frequency-dependent conductivity and in the values of typical spatial extent of diffusion of sodium ions known as the Sidebottom length.Lire moins >

Langue :

Anglais

Audience :

Non spécifiée

Vulgarisation :

Non

Établissement(s) :

ENSCL
CNRS
Université de Lille

Collections :

• Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516

Équipe(s) de recherche :

Propriétés magnéto structurales des matériaux (PMSM)

Date de dépôt :

2024-02-21T17:11:50Z
2024-02-27T10:44:11Z