Philip Minnmann
Philip Minnmann
Justus-Liebig-Universität Gießen
hte GmbH
Germany
Johannes Schubert
Johannes Schubert
Justus-Liebig-Universität Gießen
Germany
Date: March 26, 2025
Time: 1300-1400h ET
Solid state batteries are considered next-generation energy storage technology as they promise higher energy density and safety than lithium-ion batteries with a liquid electrolyte. However, the requirement of high stack pressures and insufficient power density are major obstacles for commercialization. Both aspects are closely related to the limitations of charge transport within the composite cathode.
This webinar presents an introduction on how to use electrochemical impedance spectroscopy to investigate composite cathode microstructures to identify kinetic bottlenecks. Effective conductivities can be obtained using transmission line models and be used to evaluate the main factors limiting electronic and ionic charge transport.
In combination with high resolution 3D imaging techniques and electrochemical cell cycling, the crucial role of the cathode microstructure can be revealed, relevant factors influencing the cathode performance identified, and optimization strategies for improved cathode performance developed.
An interactive Q&A session follows the presentation.
Benefits of attending the webinar
Learn about:
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The impact composite cathode microstructure can have on performance;
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How to identify and address challenges to characterizing composite electrodes;
- How effective conductivities can be used as a powerful descriptor for electrode optimization.
Presenters
Philip Minnmann is a project manager for high-throughput battery material research at HTE GmbH. He received his MSc in Materials from Rheinisch-Westfälische Technische Hochschule Aachen. Minnmann then joined Prof. Jürgen Janek’s research group at Justus-Liebig-Universität Gießen as part of the BMBF (Federal Ministry of Education and Research) FestBatt Cluster of Competence for Solid State Batteries. His PhD thesis is on microstructure and kinetics of composite cathodes for sulfide-based solid state batteries, as well as processing scalable, slurry-based solid state batteries. He joined hte GmbH in 2023.
Johannes Schubert is currently a PhD student in Prof. Jürgen Janek’s research group in Giessen, where he is part of the BMBF (Federal Ministry of Education and Research) FestBatt Cluster of Competence for Solid State Batteries. His research focuses primarily on the characterization and optimization of composite cathodes with sulfide-based solid electrolytes. He has an MSc in Material Science from the Justus-Liebig-Universität Gießen.
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