Around 90% of lithium-ion cells are currently produced in Asia. There are various efforts in Europe to set up their own battery production. Si-DRIVE's goal is to develop a cell by 2030 that consists of a nanostructured silicon anode, a novel solid electrolyte based on ionic liquids and a completely cobalt-free but lithium-rich cathode. A cell with this structure and a comprehensive recycling program could make sustainable battery production possible.
"What is special about this project is that we are working together to cover all steps of the battery value chain, from material development to prototype cell production and recycling," explains Professor Stefano Passerini, Director of the HIU. His research group is developing the novel, cobalt-free cathode material with non-critical elements such as iron or aluminum. Cobalt is listed by the European Commission as a critical raw material because it is a scarce resource and geopolitically difficult to access, which can lead to supply bottlenecks. Moreover, in the Democratic Republic of Congo, where most of the extraction takes place, the element is sometimes extracted with child labour and inhumane conditions. "At the same time, we want to significantly increase the lithium content in the coating oxide cathode compared with conventional materials in order to achieve a significant increase in energy density," says Passerini.