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Electrochemical Energy Systems | Junior Research Group

Dr. Severin Vierrath, Dr. Melanie Bühler, Dr. Carolin Klose

 

Open positions | Competence | Latest Developments | Projects and Sponsors | Team | Latest Publications | Awards

 

EES Gruppenbild 2023

 

See also: https://www.ees-lab.org

 

 

Open positions

 
Topic Date Contact person More information
Student research assistant:
Hydrogen Permeation in Anion-Exchange Membrane (AEM) Water Electrolysis
 
03/2024

Alexander Kohushölter

alexander.kohushoelter@imtek.uni-freiburg.de
 

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 Please see more job offers on our German website

 

Competence

 

The junior research group “Electrochemical Energy Systems” develops novel fuel cells, batteries and electrolysers. Our focus is on innovative manufacturing methods and materials, as well as micro-characterization and 3D imaging processes for these technologies.

 

Manufacturing and characterization

We develop new manufacturing methods and alternative materials for electrochemical energy applications: fuel cells and electrolysis cells and redox flow batteries. With new membrane systems, we are increasing the power density and durability. Furthermore, we develop new electrode structures that enable higher power densities. Methods such as electrospinning, spray coating and scalable coating processes are available in the group for this purpose. We characterize new materials and manufacturing methods electrochemically in fuel cell, electrolysis and battery test stands, as well as ex-situ in our microanalysis laboratory (µXRF, Xe-Plasma FIB / SEM, Raman microscopy, …).

We cover the entire value chain from catalyst and membrane production, ink and MEA production as well as electrochemical and microscopic analysis.


 

Latest developments in the group

 

Increased electrolysis performance with a low catalyst content

Iridium oxide is a particularly rare and expensive catalyst material that has so far been indispensable for water electrolysis. Therefore, the reduction in iridium oxide loading is very important for the commercialization of hydrogen production via electrolysis. We have made significant advances in the manufacture of electrolysis membrane electrode assemblies:
By introducing iridium oxide nanofibers, the electrical transverse conductivity of the catalyst layers could be significantly improved leading to one of the highest efficiencies with low IrOx loading.
(https://pubs.acs.org/doi/abs/10.1021/acsaem.0c00735 )

The technology received the F-Cell Award in 2019 and a patent has been submitted. (https://f-cell.de/award/ )

 

Manufacture of fluorine-free fuel and electrolysis cellsEES, Cover AEM, 2020

Commercially available fuel and electrolysis cells today contain fluorine-based polymers, so-called perfluorinated sulfonic acids. With alternative materials based on polysulfones and polyphenylenes, we were able to take a major step towards fluorine-free cells with comparable performance:

https://onlinelibrary.wiley.com/doi/full/10.1002/aenm.201903995


 

 

 

Reconstruction of electrodes to simulate transport propertiesEES LOGO 2018-06

With an infiltration method developed in our group via atomic layer deposition, we are able to produce reliable 3D reconstructions of the nanostructure of fuel cell, battery or electrolysis electrodes. With our extensive software equipment and expertise, we are able to assess the substance transport in these electrodes quantitatively. The methodology has now been transferred to fuel cells, electrolysis cells or Li-ion batteries.

 

 

 

Projects and sponsors

 

Current research projects

 

Past projects

  • Dekade, BMBF
  • DirectMEA, Ministry of Economics Baden-Wurttemberg
  • Inspire, EU Horizon 2020
  • Neurofast, BMBF

 

Images of our non-profit projects

Image database. Please ask for the rights of use.

 

Team

 

Head

  

Scientific staff

  • Dr. Giorgi Titvinidze
  • Frieder Junginger
  • Dr. Marco Viviani
  • Clara Schare
  • Niklas van Treel
  • Hassan Fadlullah
  • Hendrik Sannemüller
  • Dr. Dennis Rusitov
  • Frederik Brendel
  • Luis Hagner
  • Tim Kiefer

 

PostDoc

 

PhD Candidate

  • Joey Disch
  • Edgar Cruz Ortiz
  • Khaled Seteiz
  • Christian Piesold
  • Mohamed El Shamy
  • Julian Stiegeler
  • Fiona Pescher
  • Regina Qelibari
  • Hannes Liepold
  • Frederik Brendel

 

Master student, Bachelor student, Student assistant

  • Xaver Kolb
  • Sophia Kilian
  • Luis Hagner
  • Carol-Ann Kuhn
  • Felix Wölfle
  • Hannes Grammel
  • Ibrahim Abou Basha
  • Kushal Shah
  • Nodar Dumbadzde
  • Matthias Zumkeller
  • Christian Völker
  • Felix Vossbrink

 

Past member

  • Dr. Matthias Breitwieser
  • Arne Götze
  • Zsoltan Danilo
  • Dr. Lukas Zielke
  • Armin Hartmann
  • Kevin Holdcroft
  • Michaela Frase
  • Dr. Lili Liu
  • Dr. Matthias Klingele
  • Peter Holzapfel
  • Dr. Witali Beichel
  • Dr. Friedemann Hegge
  • Dr. Van Chuyen Pham
  • Riko Moroni
  • Mohammad Solihul Mumin
  • Philipp Veh
  • Brian Shanahan
  • Dr. Florian Lombeck
  • Claudia Schwarz
  • Dr. Andreas Büchler
  • Farmal Khan
  • Dilara Sultanova
  • Neda Khalili Sabet
  • Jacqueline Goldmann
  • Akshaya Mani
  • Mohamed Dhia Chabaane
  • Hien Nguyen
  • Koray Yildirim
  • Miriam von Holst
     


 

Latest Publications

 

Electrolysis

 

Fuel Cells

 

Redox-Flow Batteries

Micro Analysis

 

 

 

Awards

 

  • f-cell award – Innovationspreis Brennstoffzelle in der Kategorie Forschung & Entwicklung (09/2019)
  • Innovationspreis für Masterarbeit (05/2019)
  • Nachwuchsförderpreis der Eva-Mayr-Stihl-Stiftung (11/2018)
  • Innovationspreis des Deutschen Wasserstoff- und Brennstoffzellenverbands (DWV) (04/2018)
  • Best Poster Prize beim Hereaus-Seminar, Bad Honnef (07/2017)
  • Best-Poster-Award für Brennstoffzellenkonzept (02/2017)
  • Promotionspreis für Matthias Breitwieser (11/2015)
  • Prämierter Vortrag und Top-Platzierung beim Fotowettbewerb der Baden-Württemberg Stiftung (10/2015)
  • f-cell award – Innovationspreis Brennstoffzelle (10/2015)
     

 

 

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