Mark E. Orazem
Mark E. Orazem
Distinguished Professor and Associate Chair for Graduate Studies
Department of Chemical Engineering
University of Florida, US
Date: December 4, 2024
Time: 1000–1100h ET
Recent battery papers commonly employ interpretation models for which diffusion impedances are in series with interfacial impedance. The models are fundamentally flawed because the diffusion impedance should be part of the interfacial impedance. A general approach is presented which shows how the charge-transfer resistance and diffusion resistance are functions of the concentration of reacting species at the electrode surface. The resulting impedance model incorporates diffusion impedances as part of the interfacial impedance.
An interactive Q&A session follows the presentation.
Benefits of attending the webinar
- Learn how to develop interpretation models to extract physical information from impedance data;
- Develop an appreciation for the role of diffusion impedance at electrode interfaces;
- Learn how the impedance results relate to system properties.
Presenter
Mark Orazem obtained his BS and MS degrees from Kansas State University and his PhD in 1983 from the University of California, Berkeley. In 1983, he began his career as Assistant Professor at the University of Virginia, and in 1988 joined the faculty of the University of Florida, where he is Distinguished Professor of Chemical Engineering and Associate Chair for Graduate Studies. Prof. Orazem is a Fellow of The Electrochemical Society, International Society of Electrochemistry, and American Association for the Advancement of Science. He served as President of the International Society of Electrochemistry and co-authored, with Bernard Tribollet of the Centre national de la recherche scientifique (CNRS), the textbook titled Electrochemical Impedance Spectroscopy, now in its second edition. Prof. Orazem received the ECS Henry B. Linford Award, ECS Corrosion Division H. H. Uhlig Award, and with co-author Bernard Tribollet, the 2019 Claude Gabrielli Award for contributions to electrochemical impedance spectroscopy. Prof. Orazem has taught Short Courses on impedance spectroscopy for The Electrochemical Society since 2000.
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