|ABOVE: Makowska setting up her high-temperature, pressure-controlled fuel cell experiment on a neutron beamline at J-PARC in 2016. PHOTO courtesy of Małgorzata Makowska.|
Young Scientists: Interview with Małgorzata Makowska
Experiment: In-situ energy resolved neutron imaging studies of phase transition and creep behavior in half-solid oxide cells during thermal and red-ox cycling
Experiment period: 2016-03-01 – 2016-08-31
Neutron source: J-PARC (Tokai, Japan)
Supervisor: Luise Theil Kuhn, DTU
Co-supervisor: Markus Strobl, ESS
Experiment with Focus on Solid Oxide Fuel Cells (SOFC)
In her Interreg experiment, Małgorzata Makowska studied fuel cells at a microstructural level. Fuel cells consist of three layers: an anode, a cathode and an electrolyte. Małgorzata´s experiment was focused on observation of the microstructure changes in the nickel-based composite used for anodes, aiming to improve their performance and durability. She has investigated the influence of stress on the processes crucial for SOFC performance and durability.
“One cell can provide voltage on the order of 1V, which is not sufficient for most of the devices used in everyday life,” explains Makowska. “In reality, SOFC cells are put together into a stack, which provides a useful power. During stack assembly very high load is applied, creating significant stress field in cells. Processes taking place in SOFC anodes under operating conditions and under influence of stress can be visualized using energy resolved neutron imaging.”
“Such an experiment has a long preparation phase, a few days of measurement and then the data analysis part, which takes at least a couple of weeks. There are no standard tools available for analysis of data acquired with this technique, therefore I had to write my own computer programs to be able to evaluate and interpret the data recorded during the experiment.”
Makowska explains that there is usually a whole team involved in a neutron experiment.
“In Japan, our experiment was running 24 hours a day. The samples were exposed to very high temperature, about 800-900 degrees Celsius, and special atmospheres. So there had to be people at the beamline all the time to monitor it. After data analysis the results are discussed with other team members as well.”
Improving Existing Technology
The experiment resulted in more knowledge about SOFCs, which can help to optimize them, making them more efficient and durable.
“Fuel cells are already used in many areas of everyday life,” says Makowska. “They can for example be used in big ships, trains and trucks. They are also used in households providing an additional energy source. The improvement of the fuel cells, and thus their popularization, will have a positive effect on the environment as fuel conversion using fuel cells doesn´t lead to production of any greenhouse gasses or toxic substances.”
“The experiment was an interdisciplinary project. My group from DTU had the expertise in fuel cells, and their colleagues from ESS in neutron imaging techniques.
“When I conducted the experiment in Japan I was there as a user. Right now I´m ‘on the other side’, helping other users to perform experiments on the neutron instrument NECTAR.”
In her current work, Makowska is still in contact with the group from DTU and ESS. She thinks having a good network as a scientist is very important. Her contract with the FRM II runs for three years. After that she would like to continue working within the same research field.
“A possibility would be to work at ESS in the future,” says Makowska.
Małgorzata Makowska graduated in applied physics from Gdansk University of Technology in 2007. She continued her studies at Technical University of Denmark (DTU) and concluded her PhD project in the end of 2015. After submitting and defending her PhD thesis in March 2016, Małgorzata got involved in the Interreg project and stayed at DTU as a postdoc for another 8 months. Małgorzata is specialized in neutron imaging.
Text and interview: Kristina Sandberg Hrbinic, Project Secretary for ESS & MAX IV: Cross Border Science and Society
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