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Electrochemical Impedance Spectroscopy

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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.

 

Complete List EIS Application Notes »

Basics of Electrochemical Impedance Spectroscopy

Posted by gamry on April 17, 2021

This tutorial presents an introduction to Electrochemical Impedance Spectroscopy (EIS) theory and has been kept as free from mathematics and electrical theory as possible

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Total Harmonic Distortion: Theory and Practice

Posted by gamry on April 15, 2021

This application note discusses Total Harmonic Distortion (THD), which shares characteristics with Electrochemical Impedance Spectroscopy (EIS). Both share the experimental basics but differ in the analysis of measurement data.

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Drift Correction in EIS

Posted by gamry on December 7, 2020

Drift correction has been added to the EIS experiments in the Gamry Framework, starting with software release version 7.8.4.

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Uses of Hybrid EIS

Posted by gamry on August 13, 2020

Hybrid Electrochemical Impedance Spectroscopy (EIS) is a galvanostatic impedance spectroscopy experiment that can be used for samples that have impedances that change significantly with frequency.

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EIS in Wetting of Lithium-ion Battery Materials

Posted by gamry on January 8, 2019

Lithium-ion batteries (LIBs) as electrochemical energy storage systems are key substitutes for fossil fuels. They are valuable also because of their low weight, high energy-density and long service life.

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Quality of Your Fit in EIS

Posted by gamry on January 8, 2019

Electrochemical Impedance Spectroscopy (EIS) is now ubiquitous in the electrochemical research, development, and quality-control world. The technique compares the observed data from an EIS scan to a hypothetical model network of resistors, capacitors, inductors, and other theoretical components.

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EIS on Curved Electrodes

Posted by gamry on April 3, 2018

The purpose of this Technical Note is to show that you can do EIS using Gamry Instruments’ potentiostats not only on flat samples in electrochemical cells, but also on curved parts not immersed in a liquid medium.

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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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