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Electrochemical Energy Systems | Junior Research Group

Dr. Matthias Breitwieser, Dr. Severin Vierrath

 

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

 

EES, Gruppenfoto 2020, klein

 

Open positions

 
Topic Date Contact person More information
PhD-Thesis: Electrodes for CO2-Electrolysis 10/2020 Dr. Severin Vierrath
Phone: +49 761 203 54060
severin.vierrath@imtek.uni-freiburg.de
 
Job ad (PDF)
 PhD-Thesis: Degradation in PEM-Fuel Cells

10/2020

Dr. Severin Vierrath
Phone: +49 761 203 54060
severin.vierrath@imtek.uni-freiburg.de

 Job ad (PDF)

 

 

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

 

 

Team

 

Head

 

 

Scientific staff

 

PostDoc

  • Dr. Naghmeh Mirbagheri
  • Dr. Chuyen Pham

 

PhD Candidate

 

Master student, Bachelor student, Student assistant

  • Edgar Cruz-Ortiz (Master student)
  • Miriam von Holst (Master student)
  • Khaled Seteiz (Master student)
  • Luca Bohn (Bachelor student)
  • Farmal Khan (Student assistant)
  • Sophia Kilian (Student assistant)
  • Souaad Saoud (Student assistant)
  • Clara Schare (Student assistant)
  • Caroline Schneider (Student assistant)

 

Past member

  • 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


 

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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