YOSHIKADO, Shinzo; ITO, Yoshiaki; RÉAU, Jean-Maurice

doi:10.1016/S0167-2738(02)00489-7

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YOSHIKADO, Shinzo
Department of Electronics

ITO, Yoshiaki
Institute for Chemical Research

RÉAU, Jean-Maurice
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Solid State Ionics. 2002, vol. 154-155, p. 503-509

Elsevier

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The purpose of this study is to fabricate single crystals of the solid solution system Pb1−xSnxF2 (x=0, 0.1, 0.2) and to further clarify the correlation between the crystal structure and the ionic conduction by crystal structure analysis and the examination of the frequency dependence of the complex ionic conductivity using an impedance spectroscopy method. The frequency dependence was precisely measured in wide frequency and temperature ranges. The hopping frequency of fluoride ions could then be estimated. It became clear that the activation energy for mobile fluoride ion generation was very small in the system of Pb0.9Sn0.1F2 and Pb0.8Sn0.2F2, and all fluoride ions were mobile. It is suggested that the activation energy, with which fluoride ions hop to adjacent sites, is determined by the bottleneck formed by (Pb2+, Sn2+) ions.< Leer menos

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Anion conductors

Pb-Sn solid solution

Fluoride ion conduction

Crystal structure

Impedance spectroscopy

Gate model

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Fluoride ion conduction in Pb1-xSnxF2 solid solution system

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