A short, practical introduction to EIS for students and engineers who would like to understand Nyquist plots without suffering unnecessarily.
You have probably seen impedance spectra that look like mysterious semicircles, depressed arcs, or strange tails — and wondered what they actually mean. This short guide was written to answer exactly that question. Instead of heavy formalism, the focus is on practical interpretation:
- how to read Nyquist and Bode plots correctly
- what equivalent circuits actually represent
- how to avoid the most common mistakes in real experiments
The goal is simple: to help you move from “I can fit a curve” to “I understand what is happening”.
The book is based on teaching experience and real experimental work in electrochemistry and materials science.
Why another book on impedance?
Because many existing ones are:
- either too theoretical
- or too long
- or assume that confusion is a normal learning strategy
This one tries to be:
- short
- clear
- and occasionally helpful.
If this guide helped you understand at least one Nyquist plot, it has already achieved more than some much longer texts.
Topics covered
- Nyquist plots and their interpretation
- Bode plots (magnitude and phase)
- Equivalent circuits (including Randles, CPE, Warburg)
- Common mistakes in impedance analysis
- Practical examples from electrochemistry
Free download:
Lugovskoy, A. (2026). Electrochemical Impedance for Electrochemists: A Practical Introduction. Zenodo. https://doi.org/10.5281/zenodo.19151752
