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Passive components

Due to the continuing growth of automotive, industrial and IoT Industries the request for electronics and therefore also for passive components is still increasing. Especially the new Wide bandgap devices are requiring “new” passive components with extended temperature and frequency range.

New capacitors and supercapacitors with new electrolytes, dielectric materials or inductors with new magnetic materials are required. Further on the reliability of the components must be improved.

Research scope

We have a strong interest in developing the next generation passive components matching the performance levels of new semiconductors. We focus on new electrolytic capacitor systems with low ESR behaviour (Polymer electrolytes), film capacitors with new dielectric materials for high temperature application > 150 °C and magnetic materials with low losses. Another focus is on thermal, lifetime and electrical simulation based on the acquisition of physical chemical data.

Accordingly, our research goals are:

  • to reduce the ESR behaviour of electrolytic capacitors (by factor 10),
  • to develop new dielectric materials for film capacitors for temperature applications above 150 °C,
  • to reduce the losses of magnetic materials.

Thereby the impact of our research is

  • Increased current and power density and efficiency to be used in automotive and industrial drives and
  • Increased device reliability and lifetime.

Research topics

Aluminium electrolytic capacitors

  • Materials for Aluminium electrolytic capacitors
    • Electrolyte development
    • Conducting polymer electrolytes
    • Chemistry of aluminium electrolytic capacitors
    • Anodes and cathode materials / Anodic oxides
    • Separators / Papers
  • Design of Aluminium electrolytic capacitors
    • Construction / housing, terminals and insulation
    • Thermal models
    • Lifetime models
  • Application of Aluminium electrolytic capacitors
    • Design-in
    • Cost and material consulting

Metalized film capacitors

  • High Dk materials
  • High voltage applications > 3kV
  • High temperature dielectrics > 125 °C

Super capacitors

Battery materials and chemistry

Research group


Find selected projects here:


Find latest publications here:

  • Degradation Behavior of Scalable Nonfullerene Organic Solar Cells Assessed by Outdoor and Indoor ISOS Stability Protocols, Greenbank, W., Djeddaoui, N., Destouesse, E., Lamminaho, J., Prete, M., Boukezzi, L., Ebel, T., Bessissa, L., Rubahn, H-G., Engmann, V. & Madsen, M., 10. Jun 2020, In : Energy Technology, Read more

  • First-principles theory of electrical breakdown in barrier anodic films in contact with an electrolyte. Bordo, V. & Ebel, T., 18. Jun 2020, In : Electrochimica Acta. 354, 9 p., 136490., Read more

  • Improved method of power inductor design with DC current impact. Mo, W. K., Paasch, K. & Ebel, T., 9. Jul 2020, 2020 IEEE 14th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG) . IEEE Press, Read more


Associate Prof. Dr. Thomas Ebel Tel. +45 65501288 /

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Last Updated 17.12.2020