Alternative Energy Generation and Pumping Devices – Electrokinetic Energy Conversion

PhD defence, Friday 6 April 2018, David Nicolas Østedgaard-Munck.

2018.04.06 | Trine Berndt Turtiainen Scheelke

David Nicolas Østedgaard-Munck

Shown is an illustration of a flow cell in which electrokinetic energy conversion takes place. Here a pressure difference across the membrane drives positive lithium ions through, while their negative counterpart is repelled. This induces electrode reactions which sends electrons through an external electrical circuit, lighting the lightbulb. Thus the kinetic energy of a pressure difference is converted into electricity

During his PhD-studies, David N.Ø.-Munck has researched the conversion of fluid pressure into electricity and vice versa electricity into pumping power. The reversible process investigated is called electrokinetic energy conversion, and it exploits how plastic membranes are selective towards ions of a certain charge. If water is pushed through the membrane and along with it positive ions, these would be balanced by negative electrons, i.e. electricity, travelling around the membrane, being harvested in an electric circuit. And so fluid pressure is converted to electricity. This process also works in the opposite direction by applying an electric current to the system which drags ions and water through the membrane, thereby pumping. This study is a step forward towards applying electrokinetic energy conversion for applications within energy storage and, most significantly, microfluidic pumping.

The PhD degree was completed at the Department of Engineering, Science and Technology, Aarhus University.

This résumé was prepared by the PhD student.

Time: Friday 6 April 2018 at 13:00
Place: Building 1514, room 213, Langelandsgade 140, 8000 Aarhus C
Title of PhD thesis: Electrokinetic Energy Conversion, Reversible Pumping and Power Generation in Ion-Exchange Membranes.
Contact information: David Nicolas Østedgaard-Munck, e-mail:
Members of the assessment committee:
Professor Anthony Szymczyk, Institut des Sciences Chimiques de Rennes UMR 6226 Université de Rennes
Associate Professor Morten Lykkegaard Christensen, Department of Chemistry and Bioscience - Section for Chemistry - Aalborg University.
Chairman: Associate Professor Stefan Hallerstede.
Main supervisor:
Associate Professor Anders Bentien, Deptartment of Engineering, Aarhus University.
Assistant Professor Jacopo Catalano,  Deptartment of Engineering, Aarhus University .
Language: The PhD thesis will be defended in English

The defence is public.
The dissertation is available for reading at the Graduate School of Science and Technology/GSST,
Ny Munkegade 120, building 1520, rooms 128-134, 8000 Aarhus C.

PhD defence
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Revised 16.04.2018