Correlation between I-Ag distance and ionic conductivity in AgI fast-ion-conducting glasses

A large number of AgI-based fast-ion-conducting glasses have been investigated by K-iodine extended x-ray absorption fine structure spectroscopy (EXAFS) measurements at liquid nitrogen temperature. A general correlation between the I-Ag distance measured by EXAFS and the glass activation energy for...

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Bibliographic Details
Published in:Physical review letters 2008-10, Vol.101 (15), p.155901-155901, Article 155901
Main Authors: Sanson, A, Rocca, F, Armellini, C, Dalba, G, Fornasini, P, Grisenti, R
Format: Article
Language:English
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Summary:A large number of AgI-based fast-ion-conducting glasses have been investigated by K-iodine extended x-ray absorption fine structure spectroscopy (EXAFS) measurements at liquid nitrogen temperature. A general correlation between the I-Ag distance measured by EXAFS and the glass activation energy for dc ionic conductivity has been found out: glasses with longer I-Ag distances display higher ionic conductivity, independently from the chemical composition of their host glassy matrix. This behavior can be related to the progressive increase of the "pathway volume" for ionic conduction.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.101.155901