Fabrication of high-efficient electrodes for alkaline water electrolysis using a single-stage high-rate ultrashort-pulse laser process

Co-funded by:

Fraunhofer Cluster of Excellence: Advanced Photon Sources (CAPS)

Duration: Oct 2021 – Dec 2022

Under the leadership of the Fraunhofer Institute for Laser Technology (ILT) in Aachen and together with the Fraunhofer Institute for Manufacturing Technologies and Advanced Materials (IFAM) in Dresden, the transfer of laser process parameters from laboratory and pilot plant scale to a highest-power laser system is investigated as part of the Fraunhofer Cluster of Excellence CAPS. The aim of the investigations is to structure electrodes for alkaline water electrolysis with dimensions on the square meter scale at previously unattainable speeds. The project is based on the excellent results achieved in the GreenH2 project, which demonstrated the transfer of high-performance laser-structured electrodes from laboratory to pilot plant scale. The surface structures allow a significant reduction in overvoltage for alkaline water electrolysis and are at the same time robust and uncomplicated to handle. In the current project Fem-to-Giga, the laser parameters are to be transferred to femtosecond laser systems with 1 kW optical power, thus allowing processing in process times required for an industrial implementation.