Analysis and Mitigation of Electrochemical Impedance Spectroscopy Artefacts in Four-Electrode Cells: Model and Simulations

作者：Fan Mu^*; Stojadinovic Jelena; Battistel Alberto; La Mantia Fabio

来源：ChemElectroChem, 2015, 2(7): 970-975.

DOI：10.1002/celc.201500121

• artefact minimization
• electrochemical impedance spectroscopy
• equivalent circuits
• four-electrode electrochemical cell
• interfaces

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.

• 出版日期2015-7-15