Open AccessThe Experimental Verification of a Generalized Model of Equivalent Circuits
Author(s) -
Zoltán Lukács,
Dávid Baccilieri,
Tamás Kristóf
Publication year - 2021
Publication title -
hungarian journal of industry and chemistry/hungarian journal of industrial chemistry
Language(s) - English
Resource type - Journals
eISSN - 2450-5102
pISSN - 0133-0276
DOI - 10.33927/hjic-2021-01
Subject(s) - equivalent circuit , dielectric spectroscopy , electrical impedance , nonlinear system , polarization (electrochemistry) , dispersion (optics) , electrochemistry , analytical chemistry (journal) , work (physics) , materials science , mathematics , thermodynamics , mechanics , chemistry , mathematical analysis , voltage , physics , electrode , engineering , electrical engineering , optics , quantum mechanics , chromatography
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.