Calculation of the effective conductivity and diffusivity in composite solid electrolytes

Title: Calculation of the effective conductivity and diffusivity in composite solid electrolytes
Creator: Belova, I. V.; Murch, G. E.
Relation: Journal of Physics and Chemistry of Solids Vol. 66, no. 5, p. 722-728
Publisher: Elsevier
Resource Type: journal article
Date: 2005
Description: In this paper, two geometric models for describing the effective ionic conductivity in a composite solid electrolyte are analysed. The models make use of insulating particles, which are coated with a highly ionically conducting phase, and are embedded in an ionically conducting matrix. Using a straightforward Maxwell type analysis we derive expressions for the effective ionic conductivity and diffusivity in the composite. We also employ Monte Carlo random walk methods to calculate the effective conductivity/diffusivity. It is shown that at low volume fractions of insulating phase the Maxwell approach provides much better agreement with the Monte Carlo data than previous analytical descriptions of the effective conductivity/diffusivity.
Subject: inorganic compounds; diffusion; electrical conductivity; dispersed ionic conductors; percolation model; theoretical-model; particle-size; Monte-Carlo; insulator; enhancement; boundaries; transport
Identifier: http://hdl.handle.net/1959.13/24471
Identifier: uon:22
Identifier: ISSN:0022-3697
Language: eng
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