The Cluster of Excellence POLiS (Post-Lithium Storage) investigates new battery materials and technology concepts for efficient and sustainable storage of electrical energy. The Cluster aims at developing electrode materials and electrolytes that allow for sustainable systems based on Sodium, Magnesium, Calcium, Aluminium, and Clorine ions.
Lithium-ion and metal hydride batteries are established systems that are currently being successfully employed for energy storage in electrically powered applications. In order to make future devices safer, less expensive, more sustainable, and more powerful, researchers globally are looking for alternatives, in which lithium as charge carrier is replaced by other elements. In the CELEST research field post-lithium batteries, focus is laid on batteries using monovalent cationic (sodium, potassium), multivalent cationic (magnesium, calcium, aluminum) or anionic (chloride, fluoride) charge carriers. To realize such batteries, new functional components and materials are developed, and an understanding of the electrochemical processes is obtained. Merging concepts of organic and inorganic active materials is key to a good performance of such post-Li batteries, and organic electrode materials play an increasingly important role to enable a reversible insertion of multivalent or anionic charge carriers. CELEST partner HIU played a pioneering role in chloride-ion and fluoride-ion batteries, as well as in electrolytes for magnesium and calcium batteries. Organic electrode materials are key expertise at Ulm University, being key enablers of multivalent cell concepts.
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