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Prof. Dr. Maximilian Fichtner


Helmholtz Institute Ulm (HIU)

Helmholtzstr. 11
89081 Ulm
Phone: +49 731 50-34201
Fax:     +49 731 50-34299

maximilian fichtnerSrz5∂kit edu


Dr. Christian Punckt

Cluster Manager

Institute of Nanotechnology (INT)

Hermann-von-Helmholtz-Platz 1
76344 Eggenstein-Leopoldshafen
Phone: +49 721 608-28493

christian puncktQcx2∂kit edu

Energy Storage beyond Lithium

The integration of fluctuating renewable energy sources into the future energy economy and the establishment of electromobility requires new materials and technology concepts for powerful and sustainable electrical energy storage.

Within the POLiS (Post Lithium Storage) Cluster of Excellence, scientists from Karlsruhe and Ulm are researching future batteries, which should be powerful, reliable, sustainable and environmentally friendly. The overall objective of our Cluster is to build a fundamental understanding of a new generation of electrochemical energy storage systems and develop a platform for future stationary and mobile applications.

In order to overcome current limitations of lithium-ion battery technology, including uncertainties regarding sustainable materials supply, researchers have identified alternatives that no longer rely on Lithium. Specifically, POLiS is targeting sustainable systems based on, e.g., sodium-, magnesium-, or aluminium-ions. Such systems are called “post-Li” batteries and have the potential to store more energy, be safer, and provide a less costly, long-term option for mass applications such as stationary and mobile electrochemical storage.

With this concept, the Karlsruhe Institute of Technology (KIT), Ulm University, the Centre for Solar Energy and Hydrogen Research Baden-Württemberg (ZSW) and the University of Gießen have asserted themselves in the highly competitive Excellence Strategy of the Federal Government and the State Governments - as the only German Cluster of Excellence for battery research.

The grand challenges in the field are addressed in four Research Units, dedicated to the four key topics “Electrode Materials”, “Electrolytes”, “Interfaces”, and “Integration & Sustainable Cell Engineering”. The Research Units are organized in 14 Work Packages that comprise interdisciplinary projects.

POLiS is embedded in the research platform CELEST (Center for Electrochemical Energy Storage Ulm & Karlsruhe). CELEST was founded in 2018 by the partners KIT, Ulm University and ZSW for strategic cooperation and is one of the largest battery research activities in the world.



Call for Proposals 2020


Our first call for proposals which is aimed at postdocs and group leaders who would like to explore new directions in the post-Li world. Proposals should be submitted by Jan. 5th, 2020 and should be written according to the attached template.

Calcium Batteries
Calcium batteries: New electrolytes, improved properties


POLiS researchers at KIT develop electrolytes for calcium batteries for the first time, with useful properties at room temperature. Calcium-based batteries promise low-cost production and high energy density. This technology from the laboratory has the potential to replace lithium-ion technology as the energy store of the future.

First POLiS Conclave Meeting


For the first time all 100 employees from Ulm, Karlsruhe and Giessen met for a two-day conclave meeting to advance internal projects and develop a future strategy. It has been agreed to count on an even closer cooperation between the research groups, especially between the theoretical modelers and experimenters.

Freshly awarded Nobel Prize winner in Ulm


M. Stanley Whittingham, John B. Goodenough, and Akira Yoshino receive the Nobel Prize in Chemistry for their invention of the lithium-ion battery. M. Stanley Whittingham was at the ABAA 12 (Advanced Lithium Batteries for Automobile Applications) conference in Ulm when the news of the award went around the world.

Poster Award at the European Coating Symposium 2019


The presented research work of Julian Klemens, PhD student at POLiS, was awarded 1st place by ECS and GVT/DECHEMA. He presented the first research results on the processing of anodes for "sodium ion batteries" (SIB) and compared it with the properties of anodes for lithium ion batteries (LIB).

Opening of CELEST and POLiS
Book on Mg Batteries


POLiS spokesman Maximilian Fichtner has published the first comprehensive book on magnesium batteries. It will be printed soon. In the meantime you find the ebook under the following link.



Deutsche Forschungsgemeinschaft