Mixed ion-polaron transport in lithium vanadium-molybdenum tellurite glasses

被引：23
作者：
Montani, R. A. [1 ]
Frechero, M. A. [1 ]
机构：
[1] Univ Nacl Sur, Dept Quim, Lab Fisioquim, RA-8000 Bahia Blanca, Buenos Aires, Argentina
来源：
SOLID STATE IONICS | 2006年 / 177卷 / 33-34期
关键词：
glasses; mixed conduction; ionic conductivity; polarons;
D O I：
10.1016/j.ssi.2006.08.015
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The electrical properties of mixed ion-polaron conducting vanadium tellurite glasses of the form XLi2O center dot(1-X)[0.5V(2)O(5)center dot 0.5MoO(3)]2TeO(2) have been studied by using the impedance spectroscopy in a wide range of temperature and composition. The obtained results confirm the existence of a transition from a typically electronic (polaronic) conductive regime when the molar fraction (X) of Li2O is equal to 0, to an ionic conductive regime when X tends to 1. This transition is characterised by a deep minimum in the electrical conductivity of about 3 orders of magnitude. The correlated behaviour between conductivity and the mean distance between lithium ions and between vanadium ions reinforces the key idea of two independent migrating paths for both electrons and ions, respectively. (c) 2006 Elsevier B.V. All rights reserved.
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页码：2911 / 2915
页数：5
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