Researchers from the Fraunhofer Institute for Surface Engineering and Thin Films IST and the Fraunhofer USA Center Midwest have launched the LIMAC project. The initiative, which focuses on amorphous carbon interlayers for lithium-metal battery cells, began in September 2025 and is scheduled to run until August 2028.
The project aims to improve battery lifespan and performance by utilizing lithium as an active anode material. Scientists are investigating the interface between the lithium-metal anode and the electrolyte, as its stability is considered critical for the durability of the battery cells.
To enhance this interface, the team is applying thin amorphous carbon layers to copper current collectors using a Laser-Arc PVD process. These coated materials will undergo testing in battery cells and be compared against reference cells to identify the most effective properties for stability.
Beyond technical development, the LIMAC project includes a life cycle assessment to evaluate material and energy flows alongside environmental impacts. The researchers are also developing a concept to scale this technology for use in larger pouch cells, aiming to reduce electric vehicle weight while maintaining energy density.
