Electrochemical Impedance Spectroscopy


EIS: A Powerful Technique

Electrochemical Impedance Spectroscopy (EIS) is a powerful technique with a broad range of research applications.  Click on a link below to view the Application or Technical Note.


The Annual EIS Course in Houston, TX will be held in Fall 2018.  More information with dates will be available soon.

Complete List EIS Application Notes »

EIS: Potentiostatic or Galvanostatic Mode?

Posted by gamry on June 8, 2017

Electrochemical Impedance Spectroscopy (EIS) measurements are more often performed in potentiostatic mode than under galvanostatic mode. The reason is partly convention and partly driven by materials.

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Waveform Generation and Frequency Resolution

Posted by Dominik on August 25, 2016

This Technical Note outlines how waveform signals are generated with a potentiostat. Further, the term “frequency resolution” is discussed which is often mentioned in specification sheets for potentiostats.

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Determination of the correct value of Cdl from the impedance results fitted by the commercially available software

Posted by gamry on March 11, 2015

With the introduction of a constant phase element (CPE) as a replacement for the capacity in EIS measurements, most of the experimentally obtained results could be fitted by commercially available software.

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Use of Transmission Lines for Electrochemical Impedance Spectroscopy

Posted by gamry on October 20, 2014

This application note discusses theory and practice of transmission lines.

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How Cabling and Signal Amplitudes Affect EIS Results

Posted by gamry on August 12, 2014

Accuracy Contour Plot (ACP) describe a region of accuracy over a given range of impedances and frequencies under a defined set of conditions.

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Getting Started With Your First Experiment

Posted by gamry on July 28, 2014

Electrochemical impedance spectroscopy (EIS) is a powerful technique that utilizes a small amplitude, alternating current (AC) signal to probe the impedance characteristics of a cell.

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Raman Spectroscopy

Posted by gamry on January 6, 2014

This application note discusses Raman spectroscopy and its combination with electrochemical techniques.

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Low-impedance EIS at its Limits: Gamry Reference 30k Booster

Posted by gamry on August 2, 2013

This Application Note describes measurement of very small impedances using Electrochemical Impedance Spectroscopy (EIS).

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Verification of Low-impedance EIS Using a 1 mΩ Resistor

Posted by gamry on August 2, 2013

This application note describes a series of EIS measurements made on a 1mW surface-mount resistor.

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Create Your Own Components for EIS Modeling

Posted by gamry on August 2, 2013

With Gamry’s Echem Analyst and Model Editor you can create all sorts of EIS models provided they are made up of series and parallel combinations of 8 different basic circuit components.

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