Electrochemical impedance spectroscopy of phase transition materials

Francesco Ciucci, Wei Lai

    Research output: Research - peer-reviewArticle

    • 16 Citations

    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).

    LanguageEnglish (US)
    Pages205-216
    Number of pages12
    JournalElectrochimica Acta
    Volume81
    DOIs
    StatePublished - Oct 30 2012

    Profile

    Electrochemical impedance spectroscopy
    Phase transitions
    Perturbation techniques
    Boundary conditions

    Keywords

    • Impedance spectroscopy
    • Intercalation
    • Lithium battery
    • Phase transition

    ASJC Scopus subject areas

    • Electrochemistry
    • Chemical Engineering(all)

    Cite this

    Electrochemical impedance spectroscopy of phase transition materials. / Ciucci, Francesco; Lai, Wei.

    In: Electrochimica Acta, Vol. 81, 30.10.2012, p. 205-216.

    Research output: Research - peer-reviewArticle

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