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Determination of Transport Properties for Solid Ionic Conductors

Published online by Cambridge University Press:  21 February 2011

Richard Pollard  and
Thierry Comte
Richard Pollard
Affiliation:
Department of Chemical Engineering, University of Houston, Houston, TX 77204
Thierry Comte
Affiliation:
Department of Chemical Engineering, University of Houston, Houston, TX 77204
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Abstract

A mathematical model has been developed that describes multicomponent transport in solid electrolytes that contain either three or four independent species. The treatment includes homogeneous reactions, short-time transients, and the effects of a co-continuous inert phase. Application of the model to low-frequency AC impedance experiments shows that accurate information on reaction stoichiometries and the nature of the mobile species is needed for proper interpretation of transference numbers and diffusion coefficients. A set of consistency checks for the impedance data is identified that helps distinguish between dilute and concentrated solid ionic conductors and between systems that should be regarded as four-species electrolytes rather than binary electrolytes.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 135: Symposium M – Solid State Ionics I , 1988 , 281
Copyright
Copyright © Materials Research Society 1989

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