Article ID Journal Published Year Pages File Type
188156 Electrochimica Acta 2012 12 Pages PDF
Abstract

In this paper the electrochemical impedance response of phase transition materials is investigated within the Cahn–Hilliard framework. The application of regular perturbation techniques allows the determination of analytical expressions for stable perturbations around constant initial condition. If the initial condition corresponds to a steady state configuration with coexistence of two phases on the sample, then approximate analytical expressions can be found by suitable modification of the boundary conditions. In particular, the impedance response of a particle being synchronously charged/discharged on both sides (reflective conditions), featuring two phases and a phase transition region, is equivalent to the impedance response of a particle of smaller size allowing current go through (absorbing conditions).

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Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
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