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BioLogic's Electrochemistry
Newsletter, Spring 2020

EIS Special: In this edition...

COVID-19 Update: The steps we are taking to help our customers during the pandemic
How to check and correct the time-variance of your system under EIS measurements: We explain how EIS Quality Indicators can be used to validate your measurements for consistent, accurate results
Electrochemical characterization of a corrosion system by Impedance spectroscopy: The high-value, EIS can add to corrosion studies.
EIS and battery screening: How EIS functionalities in battery cyclers can help speed up workflow and improve efficiencies in screening
EIS Workshops: Details of BioLogic's latest online downloadable EIS workshops, organized in collaboration with Plugvolt.
Latest articles/publications: More information on EIS.

COVID-19: Still here to help

COVID-19 is having a profound effect on people and businesses around the world. In this article, we talk about what we are doing to protect our people, our partners and the steps that we have put in place to continue supporting our customers during this difficult time. + READ MORE.

How to check and correct the time-variance of your system under EIS measurements

What is the problem? For valid impedance measurements, the system under investigation should be linear, stable, causal and stationary. EC-Lab®’s THD Quality Indicator can be used to test the linearity of the system. Stationarity here means two different things: steady-state and time-invariance. Steady-state is the state of a system that is not in a transient state. For example, an R/C circuit with a definite time-constant is submitted to a potential or current step. Its response will vary over time after reaching a... + READ MORE

Electrochemical characterisation of a corrosion system by Impedance spectroscopy

EIS allows the differentiation of physical and chemical processes occurring during corrosion. The modeling of the impedance data with equivalent circuits allows a quantification of the kinetic and diffusion/passivation/adsorption processes involved in the corrosion at the interface material/electrolytes.

Electrochemical impedance spectroscopy (EIS) is a powerful analytical method used to investigate the electrochemical properties of a wide range of electrochemical systems, especially for corrosion and applications for protection against corrosion. Impedance measurements are fast and non-destructive, as the corrosion system undergoes small AC amplitude excitations. Indeed, the measurements are performed at the steady state and have to comply with certain conditions in order to be valid (linearity, stationarity & causality).

EIS allows the differentiation of physical and the chemical processes ...+READ MORE

EIS made easy: online training

If you are working from home or don’t have access to the lab, these online webinars could be the perfect way to fine-tune your EIS skills.

EIS or Electrochemical Impedance Spectroscopy has become a valuable research tool in research and industry across a wide variety of applications. Due to its frequential nature, EIS can be used to study a wide range of phenomena: materials degradation, electrode kinetics and mass transport processes etc. These phenomena are involved in an extremely large number of applications: sensors, batteries, corrosion, fuel cells, photovoltaics, hydrogen storage, catalysis amongst others ...+ READ MORE

EIS and Battery Screening

Battery screening is an essential process present at practically every level of the battery value chain from R&D through to second life. At the R&D phase, for example, it is used to select and validate the best battery chemistries. Screening is also used in order to select the right batteries for specific applications as well as being used to validate pilot studies.
The screening process often involves electrical testing on the battery through charge/discharge cycles. During these cycles, different parameters are measured.+ READ MORE

Other EIS documentation

The following are just some of the vast array of EIS documents present on our website. Search EIS and specify "Documentation" for more application notes, articles and tutorials

Learning Centre
PEIS or GEIS? That is the question.
Why use Electrochemical Impedance Spectroscopy for battery research?
How to make reliable EIS measurements
What is EIS ?

Recent Academic publications
The effects of time-variance on impedance measurements: examples of a corroding electrode and a battery cell (academic publication)

Support Centre
EIS characterization – Fuel-Cell – Application Note 32
EIS contour plot – Electrochemistry – Application Note 54
EIS Equivalent Circuit – Electrochemistry & Battery Application Note 14
EIS Zfit – Electrochemistry, Battery & corrosion – Application Note 18
EIS Zfit – Electrochemistry, Battery & Corrosion – Application Note 45
Potentio or Galvano EIS – Electrochemistry & Battery – Application Note 49

Self-isolating due to COVID-19? Working from home? EC-Lab is perfect if you are working from home. Its Ethernet capability means that you can work remotely, wherever you are. Furthermore, the software can be easily downloaded from our website, so you can easily install it on a home PC. Please note that remote working will be dependent on the cell being already connected. Users should ensure that the setup of their experiment is safe and secure whether they manage it from the laboratory or their home.
Click here for more information on EC-Lab Potentiostat/galvanostats

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BioLogic helps shape the future of research projects and industrial innovations around the globe. Our high-precision, high-performance measurement instruments, powered by advanced, user-friendly software help scientists and industrial experts in such diverse fields as electrochemistry, battery & material testing, rapid kinetics, spectroscopy and photosynthesis