Electrochemical Impedance Spectroscopy

eis5

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 »

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.

Read the full article »

The 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.

Read the full article »

Total Harmonic Distortion: Theory and Practice

Posted by gamry on December 19, 2018

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.

Read the full article »

Basics of Electrochemical Impedance Spectroscopy

Posted by gamry on April 17, 2018

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

Read the full article »

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.

Read the full article »

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.

Read the full article »

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.

Read the full article »

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.

Read the full article »

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.

Read the full article »

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.

Read the full article »