Press Release

Hydrogen use is a key component of decarbonization, but ensuring the long-term operation of electrolysers and fuel cells is challenging. Fluctuating operating conditions lead to wear and performance losses. Fraunhofer IFAM has now achieved a decisive breakthrough with dynamic impedance spectroscopy: This diagnostic method enables precise analysis during operation, detects overloads in real time, and identifies weak points at an early stage. This allows for the targeted optimization of resilience and efficiency, extends the service life of the systems, and reduces operating costs – a technological leap with enormous potential for the hydrogen economy.

Together with partners from research and industry, the Fraunhofer Institute for Solar Energy Systems ISE has modified the structure of battery electrodes so that the battery cells can store 10 to 15 percent more energy at the same weight. They achieved this by more than tripling the coating thickness of the battery electrodes—for example, in lithium-ion batteries—which simultaneously reduces the number of current collectors in the battery cell. The research team implemented the new electrode architecture in lithium-ion pouch cells manufactured using industry-standard processes. Furthermore, they successfully applied the concept to zinc-ion and sodium-ion battery cells.

Lithium has become an indispensable part of our daily lives, yet its extraction takes a toll on the environment and local livelihoods. This is where the German-Chilean research project “PaNaBat” comes in: a joint networking platform aims to strengthen collaboration in research, education, technology transfer, and industrial cooperation in the areas of sustainable battery raw materials, lithium extraction, and battery recycling. Fraunhofer ISE is contributing its extensive laboratory and research infrastructure for the development of battery materials and cell technologies.

The more than 23,000 large aircraft worldwide consume approximately 350 billion liters of fuel annually and account for about 3 percent of human-caused CO2 emissions. For long-haul flights over 4,000 km in particular, there is no alternative to liquid fuels, as only these provide a sufficiently high energy density. The development of sustainable aviation fuels (SAF) has now reached an important milestone: Following successful qualification by the international standardization organization ASTM, methanol has been recognized as an approved feedstock for the alcohol-to-jet production pathway. This means that in the future, methanol-to-jet blending components can be produced and mixed with at least 50 percent by volume of conventional kerosene to create a “drop-in” fuel—one that is fully compatible and can be used without any modifications to aircraft, engines, or existing infrastructure.

Researchers from the Early-Career Research Group on Optoelectronic Thin-Film Materials at the Institute for Sustainable Technical Systems (INATECH) at the University of Freiburg and the Fraunhofer Institute for Solar Energy Systems ISE have developed a new process chain for perovskite-silicon tandem solar cells that operates entirely without solvents. The research findings have now been published in the renowned journal Joule.

How can ammonia produced from renewable sources not only be stored on board ships, but also utilized safely and energy-efficiently for propulsion? This is the question addressed by the AmHyPower collaborative project, funded by the Federal Ministry for Economic Affairs and Energy (BMWE). The Fraunhofer Institute for Microtechnology and Microsystems IMM will highlight the underlying technology at its booth at the SMM trade show in Hamburg from September 1 to 4, 2026, in Hall A4, Booth 231. As part of the project, Fraunhofer IMM is developing an ammonia cracker that will supply hydrogen or hydrogen-rich synthesis gas for a gas engine with an output of 200 kW.

Organic solar modules score points for their flexibility, transparency, and a particularly good environmental footprint. Wavelength-dependent transparency, in particular, is a major strength of organic photovoltaics. Researchers at the University of Freiburg and the Fraunhofer Institute for Solar Energy Systems ISE have now succeeded in building 14.5 by 14.5- centimeter organic PV modules with an average transparency of 43.2 percent and an efficiency of up to 9.26 percent. To achieve this, they used a combination of sputtering and slot-die coating – both processes that are industrially proven and highly scalable to large module areas.

Advancing technologies for a climate-neutral industry together: The Fraunhofer Institute for Environmental, Safety and Energy Technology UMSICHT, the Fraunhofer Institute for Applied Polymer Research IAP and the South Korean energy company SGC Energy are pooling their expertise to further develop processes for CO2 utilization and hydrogen production, as well as battery and fuel cell technologies. The partners have signed a Memorandum of Understanding to this end.

How can we successfully navigate the path to a climate-neutral future? Since 2022, this question has been the focus of the traveling exhibition “Power2Change: Mission Energy Transition.” At ten locations across Germany, it brought both challenges and potential solutions to life for a broad audience. Now that the exhibition has come to an end, Sandra Naumann takes stock. The UMSICHT researcher was involved in the “Science Communication on the Energy Transition” project almost from the very beginning and played a special role: She coordinated collaboration among the project partners and bridged the perspectives of research, museum work and science communication.

EXXOSQEL GmbH and the Fraunhofer Center for Silicon Photovoltaics CSP have jointly developed a glass-glass PV module with front and back glass panels each only 1 mm thick. A reactive coating compensates for the lower mechanical strength and stiffness of the ultra-thin glass. The demonstrator highlights the potential for lighter, more material-efficient solar modules for use in building-integrated photovoltaics and further applications.