RESelyser

The RESelyser project develops high pressure, highly efficient, low cost alkaline water electrolysers that can be integrated with renewable energy power sources (RES) using an advanced membrane concept, highly efficient electrodes and a new cell concept. Within RESelyser DTU Energy Conversion will perform advanced characterisation of alkaline electrolysis anode and cathode electrodes. RESelyser will develop improved efficiency electrodes produced by vacuum plasma spraying. Plasma spraying parameters, electrode catalysts, electrode composition, and electrode surface morphology will be explored. Electrode surface porosity is a controlling parameter that determines the electrode specific surface area for electrolysis and therefore is a controlling factor to electrode performance. Advanced three dimensional microstructure analysis methods previously developed for SOFC electrodes will be expanded and applied to alkaline electrolysis methods. This will enable in addition to specific surface area measurements, a detailed analysis of the pore space morphology in terms electrochemical performance and gas bubble evolution as a function of electrode production methods and operating conditions. The developed electrodes will be tested for performance, durability and dynamic operation on single cell scale and within a 30 kW electrolyser within the frame of the project.