The Experimental Verification of a Generalized Model of Equivalent Circuits

Authors

  • Zoltán Lukács
  • Dávid Baccilieri
  • Tamás Kristóf

DOI:

https://doi.org/10.33927/hjic-2021-01

Keywords:

Electrochemical Impedance Spectroscopy, parameter dispersion, linearized model, equivalent circuit, polarization resistance

Abstract

The determination of typical parameters of electrochemical systems, e.g. the polarization or charge transfer resistances, can be critical with regard to the application of Electrochemical Impedance Spectroscopy (EIS) if the lower frequency range is biased as a result of transport and/or adsorption/desorption processes. In such cases, the charge transfer resistance should be assessed from the higher frequency range which is typically inadequate in itself as an input for nonlinear parameter fitting. In earlier publications, an alternative mathematical treatment of both the Equivalent Circuit (EC) and of the parameter dispersion was provided using a generalized model of ECs and also a dispersion-invariant model of the electrochemical interface. In the present work, the previously presented experimental EIS results were crosschecked to verify the performance of the generalized model against a series of redox and corrosion systems. The results proved that the applied method is consistent and provides a fairly good correlation between the principal resistance data assessed by different methods.

Author Biographies

Zoltán Lukács

Center for Natural Sciences, University of Pannonia, Egyetem u. 10, 8200 Veszprém, HUNGARY

Dávid Baccilieri

Center for Natural Sciences, University of Pannonia, Egyetem u. 10, 8200 Veszprém, HUNGARY

Tamás Kristóf

Center for Natural Sciences, University of Pannonia, Egyetem u. 10, 8200 Veszprém, HUNGARY

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Published

2021-09-21

How to Cite

Lukács, Z., Baccilieri, D., & Kristóf, T. (2021). The Experimental Verification of a Generalized Model of Equivalent Circuits. Hungarian Journal of Industry and Chemistry, 49(1), 1–8. https://doi.org/10.33927/hjic-2021-01