Innovation

The overall goal of PRETZEL is to develop an innovative polymer electrolyte membrane electrolyzer (PEMEL) that provides significant increases in efficiency and operability to satisfy emerging market demands. Such electrolyzers are urgently needed in the context of the increased demands of the grid balancing market. PRETZEL is offering a break-through in becoming game changers in the field of water electrolyzers.

The project PRETZEL will innovate in the following areas:

Innovations Targets
Reduction of precious metals Increases availability, decreases CAPEX
Production of optimized current collectors with low cost coatings that will allow operation at high current densities Increase of efficiency and reduction of operative costs; reduction of bipolar plates (BPP) production costs while taking over the water distribution; increasing the power density without mass transport limitation
Corrosion resistant (BPP) without flow field Reduction of Ti and reduction of manufacturing costs
High pressure operation > 100 bar Reduction of compressor costs, increase of system efficiency
Innovative hydraulic concept for pressurizing and cooling Increases life time and efficiency; enables high current density; enables durable large active area cells

 

Each of these innovations have already proven in a small laboratory scale and can be considered being in the range of TRL 3. Hence, the overall goal of this project is to prove the functionality of these proven technologies in a realistic environment in order to advance them to TRL 5. In practice, this means integrating them into a fully functioning 25 kW, 100 bar electrolyzer system that reflects the realistic and highly dynamic conditions required by the market.