Statistical Analysis of the Measurement Noise in Dynamic Impedance Spectra

Abstract

Invited for this issue's Front Cover is the group of Professor Fabio La Mantia at the University of Bremen (Germany). The cover picture shows the developed theoretical variance of the error on the admittance and how this expression captures the experimental values of the standard deviations of the real and imaginary parts of the admittance. Read the full text of the Research Article at 10.1002/celc.202200109.

Electrochemical Impedance Spectroscopy for Electrode Process Evaluation: Lithium Titanium Phosphate in Concentrated Aqueous Electrolyte

“…The experimental data was fitted with the rational polynomial from degree four up to eight for spectra obtained under constant current, and from degree four up to nine for data obtained under constant voltage. As shown in a previous publication, [30] the Akaike information criterion (AIC) was used to constrain the complexity of the polynomials. For the constant current data, the minimum AIC was obtained for a rational polynomial of order six while for the constant voltage data, a minimum AIC was obtained for a rational polynomial of order eight.…”