Electrochemical Impedance Spectroscopy (EIS) Workshop took place at RWTH Aachen on the 27.04. and 28.04.2026

Aachen, Germany, 27.04.- 28.04.2026

Within the scope of the Franco-German cooperation on high power batteries (HIPOBAT), more than 30 researchers from 10 universities and research institutions across Germany and France visited the Center for Ageing, Reliability and Lifetime Prediction of Electrochemical and Power Electronic Systems (CARL) at RWTH Aachen to build lithium- and sodium-ion battery cells, to characterize them with electrochemical impedance spectroscopy and to interpret the gathered data together.

The two-day program covered a wide range of topics, from EIS fundamentals over six expert presentations to hands-on sessions in the chemistry lab. A particular highlight was the collaborative EIS data fitting of HiPoBat project cells, effectively linking theory with practical application.

Beyond building a strong foundation in EIS, the workshop also set the stage for future collaboration within the project, not only in the field of EIS, but also across a broader spectrum of testing and analytical methods.

These hands-on workshops are one of the key elements of the HIPOBAT project and build the foundation for a close and long-lasting collaboration between France and Germany in the field of battery science. This is only possible because the HIPOBAT project partners hosting these workshops go the extra mile to make this happen. We hope to see at least one more of these workshops during the project!