Adelhelm Group

Physical Chemistry of Materials, Electrochemistry, Batteries

We study materials for energy storage with the major focus on rechargeable batteries.

The current focus is on electrode materials for lithium-ion and sodium-ion batteries as well as on alternative cell concepts (metal-sulfur, solid-state batteries).

Our research is interdisciplinary and combines aspects of (electro-)chemistry, materials design and applied physical chemistry. 

Research Overview


Climate change is a key challenge for our society which requires more and more green electricity from wind turbines and solar panels. The storage of green electricity and its efficient use are important tasks for the coming decades. Think of rechargeable batteries for electric vehicles, household and grid storage or electrosynthesis, for example. One of the key science disciplines forming the foundations for these technologies is electrochemistry. How can we make better batteries? What happens inside a battery during charging/discharging? Why do batteries age? Can we make batteries based on abundant elements that are not limited by any resource issues or supply risks?


Preparation and modification of electrode materials by solid-state synthesis (Sulfide, oxides, metals and alloys, carbon materials). Various electrochemical methods. development of call concepts and in situ / operando methods. Interdisciplinary team of (environmental) chemists, material scientists, electrochemists and physicists.


Studying physicochemical principles of electrochemically driven reactions. Understanding ageing processes of electrode reactions and their mitigation. Understanding ion-size effects on electrode reactions. Exploring "new battery concepts". Establishing advanced characterization tools to study batteries in situ / operando.


It is our pleasure to invite you to Berlin for the 5th International Sodium Battery Symposium, SBS-5. September 23 – 25, 2024 in Berlin, Germany.
The recent growth in interest in sodium batteries has been fuelled by companies around the world implementing the technology in applications as diverse as electric vehicles, power tools and stationary energy storage. Following successful events in Jena, Berlin and Dresden, the fifth Sodium Battery Symposium will be held as a face-to-face meeting for around 250 participants in Berlin. With more than 25 presentations from renowned speakers, topics will include electrodes and liquid electrolytes for sodium-ion batteries, as well as progress towards commercialisation. The symposium aims to promote discussion, networking and collaboration across the spectrum of sodium battery technologies. Poster sessions and exhibition stands will complement the three-day conference, providing additional opportunities for engagement and knowledge exchange. More information at <link>.

Lab Tour

Discover our research journey: Meet some of the team and explore our labs in this video!