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Analysis and Mitigation of Electrochemical Impedance Spectroscopy Artefacts in Four‐Electrode Cells: Model and Simulations
Author(s) -
Fan Mu,
Stojadinović Jelena,
Battistel Alberto,
La Mantia Fabio
Publication year - 2015
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201500121
Subject(s) - electrode , capacitive sensing , electrical impedance , equivalent circuit , dielectric spectroscopy , materials science , capacitance , capacitor , electrochemical cell , reference electrode , acoustics , optoelectronics , electrical engineering , electronic engineering , analytical chemistry (journal) , electrochemistry , chemistry , engineering , voltage , physics , chromatography
The capacitive and inductive artefacts in electrochemical impedance measurements with three‐electrode cells have been understood by including the physical‐treatment stray capacitances between electrodes. In our work, the same methodology was implemented and a general equivalent circuit for four‐electrode cells was built. Mathematical analysis of the impedance artefacts related to the stray capacitances, cell geometry, and reference (sensing) electrodes are presented. In agreement with previous experimental results, the use of a capacitor bridge and bypass‐modified reference (sensing) electrodes could be simulated to identify the parameters that are capable of minimizing the distortions of the impedance spectra. It was found that, in the four‐electrode configuration, the zero‐gap cell combined with bypass‐modified reference and sensing electrodes had the optimal minimization of the artefacts.