Using the Distribution of Relaxation Times for analyzing the Kramers-Kronig Relations in Electrochemical Impedance Spectroscopy

Bernhard Zeimetz (1) , Aurelien Flura (1) , Jean-Claude Grenier (1) , Fabrice Mauvy (1)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

We propose to verify the Kramers-Kronig Relations (KKR) through comparison of two versions of the Distribution of Relaxation Times (DRT), calculated from the real and imaginary part of the impedance. When checking the integrity of impedance spectroscopy data, this method is useful to interpret correctly results when a direct calculation of the KKR integrals shows a deviation from measured data. Our method can distinguish cases (i) where a deviation from the KKR indicates genuine physical problems during the measurement from (ii) a deviation arising when the frequency range accessible by the measurement is insufficiently large.

Mots clés: Kramers-Kronig Relations; Data Integrity; Electrochemical Impedance Spectroscopy; Distribution of Relaxation Times

Domaines: Génie chimique; Matériaux; Modélisation et simulation

Bernhard Zeimetz, Aurelien Flura, Jean-Claude Grenier, Fabrice Mauvy. Using the Distribution of Relaxation Times for analyzing the Kramers-Kronig Relations in Electrochemical Impedance Spectroscopy. 2018. ⟨hal-01692003v1⟩