Chemical Energy Storage

In the context of increasing sector coupling, the conversion of electrical energy into chemical energy plays a crucial role. Fraunhofer researchers are working, for instance, on corresponding power-to-gas processes that enable the chemical storage of energy in the form of hydrogen or methane.

Competencies of the Fraunhofer Energy Alliance in the field of Chemical Energy Storage


In order to be able to reliably provide energy based on renewable generators despite the fluctuating energy supply, power-to-X technologies are gaining in importance. Whether in the context of power-to-gas, power-to-heat or power-to-liquid - the storage of energy in times of oversupply is indispensable, especially in the context of the desired sector coupling. In the field of power-to-gas technologies, the long-term storage of renewable energies in the form of hydrogen (through water electrolysis) or methane holds a key position. Hydrogen has a high energy density and offers possibilities for emission-free energy supply. Fraunhofer’s researchers have realized a solar-powered hydrogen filling station as a reference project for emission-free mobility. In further projects, concepts for the methanation of hydrogen and biogas to carbon dioxide, including co-electrolysis, are being investigated and validated.



Catalyst Development

The Fraunhofer IMM develops catalysts and catalyst coatings ideally suited for use in micro structures being optimally adapted to reactor type and scale of your process.


EU project ARENHA: Green ammonia for the energy transition



With the flagship project HYDROMETHA a novel, fully integrated system of CO2+H2O high-temperature co-electrolysis (Co-SOEC) and catalytic methanation will be developed.


The generation of hydrogen via water electrolysis is an essential part of the hydrogen infrastructure. Regeneratively generated electricity can thus be stored as hydrogen and used flexibly. Our expertise includes the application of a wide range of electrolysis methods. The portfolio of the Fraunhofer’s institutes covers the entire spectrum from material development to system integration. The application in practice is tested in the operation of different electrolysis units from laboratory scale to MW pilot scale. In particular, the focus is on cost reduction, for example through new catalysts or membranes. Furthermore, approaches to increase the operational safety, e.g. by inserting additional catalytic layers for the recombination of hydrogen and oxygen in the membrane electrode assembly (MEA), are investigated to avoid dangerous concentrations of hydrogen in oxygen. Further information on electrolysis as a central component in the hydrogen value chain can be found in our field of “Hydrogen Technologies”.




In the project, an integrated process for the production of chemical recyclables from industrial waste gas streams and water is being developed and technically demonstrated.



Proton exchange membrane electrolyzer concept for elevated temperatures and pressure conditions.


BEPPEL – Bipolar Plates for Fuel Cells and Electrolysers

Fraunhofer ISE is investigating measurement techniques to characterize metallic bipolar plates (BPP).

Storage Systems


This site is currently under construction.