Electrochemical Impedance Spectroscopy Course | EIS Training by IIT Madras

Course Details

Unlock the Power of Electrochemical Systems with Expert EIS Training

Electrochemical Impedance Spectroscopy (EIS) is a powerful, non-invasive analytical technique used to investigate the properties and processes of electrochemical systems. From optimizing battery performance for electric vehicles to understanding corrosion mechanisms and improving electroplating processes, EIS is a cornerstone of modern electrochemical research. However, mastering its intricacies—from correct data acquisition to sophisticated mechanistic analysis—requires expert guidance.

This detailed 12-week postgraduate course, instructed by Prof. S. Ramanathan from the Department of Chemical Engineering at IIT Madras, is designed to provide that expertise. Prof. Ramanathan's research focuses on general electrochemistry and the advanced use of EIS for mechanistic analysis, including pioneering work in nonlinear EIS techniques.

Who Should Take This Course?

This course is meticulously designed for:

• Postgraduate (PG) students engaged in electrochemical research.
• Researchers and scientists in industries such as batteries, electric vehicles (EVs), corrosion management, and electroplating.
• Professionals seeking to deepen their understanding of electrochemical characterization techniques.

Prerequisite: A basic background in science or engineering (B.Sc. or B.E.) is required to fully benefit from the course material.

Detailed 12-Week Course Curriculum

The course is structured to take you from fundamental concepts to advanced applications, including cutting-edge nonlinear methods.

Weeks 1-3: Foundations & Experimentation

The initial weeks build a solid foundation in both theory and practice.

• Week 1: Introduction to core electrochemistry concepts, the electrode-electrolyte interface, and EIS basics. Learn graphical data representation using Bode and Complex plane plots.
• Week 2: Dive into experimental details: instrumentation, signal inputs (single/multi-sine), FFT, frequency parameters, and techniques to avoid errors like spectral leakage.
• Week 3: Master data validation using Kramers-Kronig Transforms (KKT) to test for linearity, causality, and stability—a critical step often overlooked.

Weeks 4-7: Data Analysis & Reaction Mechanisms

This module focuses on interpreting data to extract meaningful chemical and physical insights.

• Week 4: Learn to model systems with Electrical Equivalent Circuits (EECs), understand confidence intervals, and use criteria like AIC for circuit selection.
• Weeks 5-7: Progress into reaction mechanism analysis. Derive impedance expressions for reactions ranging from simple electron transfers to complex multi-step processes with adsorbed intermediates. Identify patterns like negative resistance and learn practical challenges in kinetic extraction.

Weeks 8-10: Advanced Phenomena & Applications

Explore specific phenomena that shape impedance responses in real-world systems.

• Week 8: Understand diffusion effects and the Warburg impedance for finite and semi-infinite diffusion.
• Week 9: Analyze non-ideal behavior with Constant Phase Elements (CPE) and model porous electrodes.
• Week 10: Study passivation, film formation (Point Defect Model), and key applications in corrosion, biosensors, and fuel cells.

Weeks 11-12: The Frontier: Nonlinear EIS (NLEIS)

Go beyond traditional EIS with modules developed from Prof. Ramanathan's research.

• Week 11: Introduction to Nonlinear EIS (NLEIS). Cover the mathematical background and apply NLEIS to electron transfer reactions and those with adsorbed intermediates.
• Week 12: Tackle instabilities in traditional EIS using NLEIS, detect nonlinearities, and explore related techniques like Electrochemical Frequency Modulation (EFM).

Essential Reference Textbooks

The course content is complemented by seminal texts in the field, including:

• Orazem & Tribollet, Electrochemical Impedance Spectroscopy (Wiley, 2011)
• Lasia, Electrochemical Impedance Spectroscopy and its Applications (Springer, 2014)
• Barsoukov & Macdonald, Impedance Spectroscopy: Theory, Experiment, and Applications (Wiley, 2005)
• Lvovich, Impedance Spectroscopy: Applications to Electrochemical and Dielectric Phenomena (Wiley, 2012)

Why This Course is Essential for Industry & Research

The skills taught in this course have direct industrial relevance. Companies working on battery development for EVs use EIS to characterize cell health and degradation. Industries where corrosion is a critical challenge (e.g., oil & gas, marine, infrastructure) rely on EIS for coating evaluation and corrosion rate monitoring. Similarly, electroplating and surface engineering sectors use EIS to optimize process parameters and deposit quality.

By completing this course, you will gain not just theoretical knowledge but also practical skills in data validation, advanced modeling, and the application of both linear and nonlinear EIS—making you a valuable asset in both academic research and high-tech industrial R&D.

Ready to decode the complex language of electrochemical interfaces? This course provides the definitive guide to mastering Electrochemical Impedance Spectroscopy.

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