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Song, Hyun-Kon
eclat: ElectroChemistry Lab of Advanced Technology
Research Interests
  • Electrochemical analysis, electroactive materials, electrochemistry-based energy devices

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Electrochemical impedance spectroscopy of porous electrodes: the effect of pore size distribution

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Title
Electrochemical impedance spectroscopy of porous electrodes: the effect of pore size distribution
Author
Song, Hyun-KonJung, YHLee, KHDao, LH
Keywords
porous electrode; transmission line model; electrochemical impedance spectroscopy; electrochemical capacitor; pore size distribution
Issue Date
1999-06
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
ELECTROCHIMICA ACTA, v.44, no.20, pp.3513 - 3519
Abstract
A new model for the impedance of porous materials was developed. The transmission line model with pore size distribution (TLM-PSD) is based on the transmission line equivalent circuit, considering the effect of pore size distribution (PSD). The PSD was represented by an analytical distribution function, for example, the log normal distribution. With this model, impedance was a sole function of the representative penetrability α μ when the standard deviation σ is constant. Phase angle at low frequency or high penetrability changes from -90 degrees at σ = 0 to -45 degrees at σ = infinity. This indicates that a wider distribution leads to more porous characteristics of impedance. Experimental impedance data of a gold powder electrode were successfully fitted with the TLM-PSD.
URI
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DOI
10.1016/S0013-4686(99)00121-8
ISSN
0013-4686
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ECHE_Journal Papers
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