Molten lithium for more powerful, lighter batteries: Page 2 of 2

April 12, 2019 //By Christoph Hammerschmidt
Molten lithium for more powerful, lighter batteries
Scientists at the Fraunhofer Institute for Chemical Surface and Battery Technology (IWS) in Dresden have developed a process for producing anodes from molten lithium at lower cost. The innovation is a further step towards increasing the capacity of lithium batteries while simultaneously reducing their weight.

Previously, it was not possible to wet untreated copper or nickel foils with lithium. "However, this is absolutely necessary in order to create a coating and we can do this with a lithiophilic substrate surface," Dr. Althues concretizes. Further advantages would lie in the fact that the developed IWS technology could be implemented at particularly low cost and could already be scaled up to industrial standards in the roll-to-roll process. Modifications to the lithium surface are intended to extend this coating process in the "MaLiBa" project. The project team aims to significantly improve the handling, stability and safety of lithium anodes for use in battery cells. This work will be complemented by the development of a laser cutting process within the "LiMeCut" project, which will enable flexible assembly of lithium anodes. The result is a toolbox for adapting anodes to customer-specific cell systems and formats.

In the joint project Customized Metal Anodes for Future Battery Systems (MaLiBa) the Fraunhofer IWS in cooperation with the Justus-Liebig-University Gießen develops customized and surface-modified lithium anodes for batteries of the future, while the project LiMeCut (funded by the German Federal Ministry of Education and Research within the eurostars program) in cooperation with OxisEnergy and ULT aims at the development of a flexible laser process technology for cutting lithium anodes.

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