Sodium Ion Conductivity in Mixed Former Na2O–P2O5–GeO2 and Na2O–B2O3–P2O5–GeO2 Glasses - Université de Lille Accéder directement au contenu
Article Dans Une Revue Journal of Physical Chemistry C Année : 2021

Sodium Ion Conductivity in Mixed Former Na2O–P2O5–GeO2 and Na2O–B2O3–P2O5–GeO2 Glasses

Résumé

In this study, a mixed glass network effect (MGFE) is verified in two sodium ion conducting glass series: 40Na2O–(60 – x)P2O5–xGeO2 and 40Na2O–10B2O3–(50 – x)P2O5–xGeO2, x = 0–30 mol %. Network former substitution results in the significant electrical conductivity enhancement for both systems. This behavior is explained by the increased mobility of the Na+ ions, due to the depolymerization of the (boro)phosphate network and the emergence of easily conductive pathways after germanate incorporation and formation of various mixed Ge/P (Ge/B/P) structural units. With the help of 1D/2D MAS NMR techniques, we are able to determine and quantify structural units that form a glass network but also to gain insight into local environment and linkages between these units, which is crucial for determining the sodium ion transport mechanism.
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Dates et versions

hal-04478078 , version 1 (26-02-2024)

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Kristina Sklepić, Grégory Tricot, Petr Mošner, Ladislav Koudelka, Andrea Moguš-Milanković. Sodium Ion Conductivity in Mixed Former Na2O–P2O5–GeO2 and Na2O–B2O3–P2O5–GeO2 Glasses. Journal of Physical Chemistry C, 2021, The Journal of Physical Chemistry C, 125 (19), pp.10593-10604. ⟨10.1021/acs.jpcc.1c00072⟩. ⟨hal-04478078⟩
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