Development of an impurity-robust resynthesis process of active materials for Lithium-ion batteries
3 years (01.01.2021 - 31.12.2023)
Funding: 890.832,37 € (TUBS)
Fraunhofer Institute for Surface Engineering and Thin Films (IST)
Fraunhofer Institute for Ceramic Technologies and Systems (IKTS)
Institute of Mineral and Waste Processing, Waste Disposal and Geomechanics (IFAD), TU Clausthal
Institute for Particle Technology (iPAT), TU Braunschweig
To completely close the material cycle in battery cell production and to reduce costs and environmental impacts along the product life cycle, the recycling of end-of-life (EoL) battery cell materials is necessary. Within the battery cycle, the establishment of recycling concepts is accompanied by continuous progress in battery technologies. Due to the further development of battery chemistries, flexible processes that are insensitive to impurities are essential to ensure the consistent quality of the products.
The aim of the EVanBatter project is, therefore, the development of efficient and robust processes for the multiple conversion of recovered raw materials (secondary raw materials with a special focus on graphite and NMC) from other cluster projects, e.g. EarLiMet, PyroLith, LOWVOLMON, and Action, to economically integrate both active materials from the cathode and anode into the process cycle of electrode production. Within the framework of this project, hydrometallurgical processes for the high-quality recovery of valuable metals from the black mass will be further developed in order to remove impurities and to extract the valuable metals as high-purity metal salts, which are then resynthesized. The investigation of the usability of extracted materials in the resynthesis process, in which, among other things, the influence of the impurities of various black masses on the electrochemical performance and the battery cell product is to be investigated and evaluated. This project serves to derive recommendations for the industry, especially with regard to the necessary material and substance qualities at the end of the recycling processes, as well as the ecological and economic evaluation of the technologies.