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Modeling and experimental validation of alkaline water electrolysis cells in nanostructured electrochemical cells

Georgakopoulos Alexandros

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Year 2023
Type of Item Diploma Work
Bibliographic Citation Alexandros Georgakopoulos, "Modeling and experimental validation of alkaline water electrolysis cells in nanostructured electrochemical cells", Diploma Work, School of Electrical and Computer Engineering, Technical University of Crete, Chania, Greece, 2023
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The current global energy system is based on fossil fuels, which are the main source of carbon dioxide, a gas that is recognized as the main contributor to the greenhouse effect and thus to global warming. One possible solution would be the extensive use of renewable energy sources. However, some of these sources, such as the sun or the wind, rely on the weather as well as the time of year. This problem highlights the importance of energy storage for use in times of peak demand. To this end, the production, storage and use of hydrogen as an energy carrier has attracted enormous technological interest in recent years. Methane (CH4) reforming is currently the most efficient production process, as the final cost of hydrogen is very low compared to other methods. However, this method does not lead to the production of green hydrogen as it is accompanied by the emission of carbon dioxide. In recent years, electrochemical water splitting has garnered scientific interest as it is environmentally friendly, flexible and easy to carry out. However, the process is highly energy intensive requiring large amounts of electricity. This thesis focuses on alkaline electrolysis of water in an alkaline environment, with emphasis on the study of innovative electrodes to increase the electrochemical efficiency. Initially, a study of the literature will be carried out in order to highlight the current state of the art in the field of electrode development. Particular emphasis will be given to the structural and morphological characteristics of the electrodes and how these may affect the electrochemical performance of the electrochemical cell. On an experimental level, we will focus on the development of nanostructured nickel electrodes in alkaline solutions with the aim of optimizing the performance and finally, we will move on to the mathematical modelling of this experiment.

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