Project partner in the EU DELYCIOUS project

SIVONIC is proud to participate as a partner in the EU research project DELYCIOUS – a forward-looking initiative aimed at optimizing hydrogen production through advanced diagnostic and monitoring technologies for electrolyzers.

About DELYCIOUS: Advanced Diagnostic Tools for Electrolyzers

Funded by the Clean Hydrogen Partnership and the European Union, the DELYCIOUS project (Diagnostic tools for ELectrolYsers: Cost-efficient, Innovative, Open, Universal and Safe) aims to enhance the efficiency and longevity of electrolyzers. By integrating state-of-the-art diagnostic methods such as Electrochemical Impedance Spectroscopy (EIS) and Raman Spectroscopy, universal monitoring systems are being developed that are suitable for various electrolysis technologies – Alkaline Electrolysis (AEL), Proton Exchange Membrane Electrolysis (PEMEL), and Solid Oxide Electrolysis (SOEL).

SIVONIC's Contribution: Expertise in Electrochemical Impedance Spectroscopy

With over 20 years of experience in the development of high-precision EIS measurement systems, SIVONIC brings extensive expertise to the DELYCIOUS project. Our technologies enable precise analysis of degradation processes and operating conditions in electrolyzers – both in laboratory settings and under real operating conditions. These diagnostics are crucial for the development of an intelligent Electrolyzer Management System (EMS) that ensures efficient and reliable hydrogen production.

Project Consortium: Strong Partnerships for a Green Future

The DELYCIOUS project brings together eight leading partners from research and industry:

• Fraunhofer Institute for Wind Energy Systems (IWES) (Project Coordination)

• AIR LIQUIDE Forschung und Entwicklung GmbH

• Dumarey Softronix

• ETA Florence Renewable Energies

• HORIBA and HORIBA FuelCon

• University of Twente

• SIVONIC GmbH

• Stargate Hydrogen

Together, we are working to make hydrogen production more sustainable, efficient, and cost-effective.

Why DELYCIOUS Matters

Green hydrogen plays a central role in the energy transition and in achieving the EU’s climate goals. DELYCIOUS addresses current challenges in electrolysis technology, in particular:

• Extending the lifespan of electrolyzers

• Reducing operational costs through precise diagnostics

• Ensuring compatibility between different electrolysis technologies

• Integrating renewable energy sources into hydrogen production

By developing advanced diagnostic tools, DELYCIOUS contributes to taking hydrogen production in Europe to the next level.

Project Reports and Resources

The DELYCIOUS consortium regularly publishes updates, reports, and project results on the official project website:

www.delycious-project.eu/resources

Here you can also find specific contributions and reports from SIVONIC, documenting our progress and findings within the project framework.

As part of the EU-funded DELYCIOUS research project, SIVONIC has successfully calibrated and tested a high-precision electrochemical impedance spectroscopy (EIS-Meter) system for laboratory-scale applications. The goal of this work package was to demonstrate the measurement accuracy and reliability of the system—an essential step toward its future use with real-world electrolyzers.

The measurement system covers a wide impedance range, from a few micro-ohms to several ohms, making it suitable for a variety of cell types and operating conditions. Calibration confirmed its high precision: when measuring a low-resistance reference shunt, the deviation was well within the measurement uncertainty. The results aligned exactly with theoretical expectations and validated reference data.

Following calibration, a test measurement was conducted on an alkaline electrolysis cell from Stargate Hydrogen. The resulting Nyquist plot was of exceptionally high quality—smooth, noise-free, and without artifacts. Particularly noteworthy were two clearly distinguishable semicircles in the impedance spectrum, indicating well-separated electrochemical processes at the cathode and anode. The clear resolution across all relevant frequency ranges enables accurate interpretation and precise modeling of the electrochemical behavior.

The results confirm that SIVONIC’s EIS meter provides a reliable foundation for the development of advanced diagnostic tools within the DELYCIOUS project. It represents a key contribution to improving the efficiency, durability, and operational monitoring of modern electrolyzers.

File type: PDF
Publication: 05/2025
Language: English
Pages: 9

(Click on the document to open the PDF)