Fluorine-free alternatives and more stable materials
The team led by Dr. Benjamin Schumm, head of the Particle Technology department at the Fraunhofer IWS, is developing new binders. These are substances that hold the electrode together without any fluorine. „We link material development directly with process and system concepts and thus accelerate the transfer to industrial applications,“ says Schumm.
These fluorine-free binders are considered a key prerequisite for being able to use dry coating processes without PFAS in the long term. However, it remains to be seen whether they can completely replace existing materials. At the same time, the researchers are improving the active materials, i.e. the substances that store the energy in the battery. The cooperation partner ITRI is using a process called atomic layer deposition for this. In this process, wafer-thin protective layers are applied layer by layer to tiny particles. This coating makes the materials more stable and can increase the performance and service life of the batteries.
The FREDY project will run from September 2025 to August 2028. The results will then be transferred to industry, i.e. to production for large quantities – for manufacturers of battery cells, machines and materials, for example. The project is part of a broader trend: with stricter environmental regulations and rising energy costs, the pressure to make battery production more efficient and sustainable is growing. Dry coating processes are considered promising in this regard, but have not yet been established on an industrial scale across the board.