Small-signal apparent diffusion impedance of intercalation battery electrodes

Wei Lai, Francesco Ciucci

    Research output: Research - peer-reviewArticle

    • 29 Citations

    Abstract

    The small-signal apparent diffusion impedance of intercalation battery electrodes is studied on the basis of generalized Poisson-Nernst-Planck equations for planar, cylindrical, and spherical geometry. Compared with conventional treatment in tracking the concentration of neutral intercalation species as chemical diffusion, the present work focuses on the voltage and current terms of intercalating ions and electrons and discusses explicit physical meanings of these electrical terms, in the form of equivalent circuits. It can be shown that the present treatment generates the same results as those from conventional chemical diffusion when the electronic transference number is close to 1. Finally, the correlation between the frequency domain impedance methods and the time domain methods, such as chronoamperometry and chronopotentiometry, is discussed.

    LanguageEnglish (US)
    JournalJournal of the Electrochemical Society
    Volume158
    Issue number2
    DOIs
    StatePublished - 2011

    Profile

    intercalation
    electric batteries
    impedance
    electrodes
    Intercalation
    Electrodes
    equivalent circuits
    electric potential
    geometry
    electronics
    ions
    electrons
    Chronoamperometry
    Equivalent circuits
    Ions
    Geometry
    Electrons
    Electric potential

    ASJC Scopus subject areas

    • Electrochemistry
    • Electronic, Optical and Magnetic Materials
    • Materials Chemistry
    • Surfaces, Coatings and Films
    • Renewable Energy, Sustainability and the Environment
    • Condensed Matter Physics

    Cite this

    Small-signal apparent diffusion impedance of intercalation battery electrodes. / Lai, Wei; Ciucci, Francesco.

    In: Journal of the Electrochemical Society, Vol. 158, No. 2, 2011.

    Research output: Research - peer-reviewArticle

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