Duration: 5 hours
Electrochemical Impedance Spectroscopy (EIS) is one of the most powerful methods available in electrochemistry due to its unique advantage to separate the kinetics of different steps comprising the overall electrochemical process. It ensures detailed information about surface and bulk properties of a wide spectrum of electrochemical systems and phenomena. EIS is employed in the study of electrochemical power sources (batteries, surercapacitors, fuel cells), solid electrolytes, electroceramic materials, semiconductors, biological and biochemical systems, electrocrystallization, corrosion and others. In light of the wide range of scientific fields where electrochemical impedance can be applied, the proposed course can be beneficial for PhD students, post-doctoral fellows and scientists working in different directions of materials research.
The course is structured in two parts:
• Part I introduces the science and technology of electrochemical impedance spectroscopy: fundamental principles and nomenclature, electrical and electrochemical elements, basic kinetic models and methods for their identification;
• Part II aims at illustrating the application of EIS in studies of materials for alternative energy systems. Part of the course is published in the web site of the European Internet Centre for Impedance Spectroscopy (EICIS):
- Electrical Impedance. Transfer function and Impedance. Electrochemical Impedance Spectroscopy. Main working hypotheses. Principles of the electrochemical impedance measurements. Data presentation.
- Electrochemical Impedance Modeling. Model structures and operation with them. Model elements. Lumped elements. Frequency distributed elements. Simple combinations of elements. Physical meaning of the elements.
- Electrochemical Impedance Models. Basic Structural Models. Models without diffusion limitations. Models with diffusion limitations.
- Data Analysis. Parametric identification. Structural Identification Approach.
- Application of Electrochemical Impedance Spectroscopy for investigation of materials for alternative energy systems – examples.