Multisin and Dynamic Impedance Spectroscopy

Modeling of the experimental impedance data is performed to obtain an electrical equivalent model and/or physicochemical parameters. parameters. The first step is to obtain correct and reproducible impedance data (verified by Kramers-Kronig or ZHIT transforms). The next step is to fit the proposed model. There are two types of models: physicochemical (described by the physicochemical parameters such as rate or equilibrium constants, surface coverage) and formal modeling, which is a fit to an electrical equivalent model. However, there are many different electrical equivalent models that can approximate the data, leading to ambiguities. The number of parameters used in the approximations must be kept to a minimum, and statistical t and F tests are used to decide which parameters are statistically are statistically important.

Short biography:

Professor Andrzej Lasia is an Emeritus Professor from the Chemistry Department of Sherbrooke University in Quebec, Canada. He is best known for his renowned book in impedance spectroscopy "Electrochemical Impedance Spectroscopy and Its Applications". He obtained his Ph.D from the University of Warsaw, Poland, 1975 and worked at Université de Sherbrooke since 1983. During his active and then retired years his main focus was on impedance spectroscopy in connection with electrocatalysis, hydrogen adsorption, absorption and evolution, water electrolysis, porous electrodes, corrosion of metals, etc. as well as the theoretical background of impedance spectroscopy and relaxation techniques. In total, he has 162 scientific publications, over 145 conference presentations and has been a guest speaker around 100 times.