Ecologically friendly dry coating of battery electrodes with optimized electrode structure (ÖkoTroP)

Project duration:
01.02.2020 – 31.01.2023


  • Landshut University of Applied Sciences (HAWL)
  • Fraunhofer Institute for Manufacturing Engineering and Automation (IPA)
  • Fraunhofer Institute for Silicon Technology (ISIT)
  • TU Braunschweig, Institute for Particle Technology (iPAT)
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TU Braunschweig
Fraunhofer Gesellschaft

The aim of ÖkoTroP is the development of technologies for the production of homogeneous dry-coated electrodes with optimized electrode structure.

Within the project, the electrostatic dry coating from the LoCoTroP project as well as the brush application from the HiLo project of the first ProZell cluster will be continued and optimized. In addition, the basic feasibility of the sieve application and the direct calendering will be demonstrated and the performance will be characterized, also in comparison with the first mentioned processes. All technologies will be transferred to the roll-to-roll process level for both graphite anodes and NCM 622 cathodes. In addition to the development of correlations between processes, parameters and electrode performance, the variables determining the resource consumption of the technologies are also investigated and compared. Furthermore, important quality parameters of the four dry coating processes (among others uniformity of the coating thickness, mass loading, mechanical stability and edge formation) are to be identified and enhanced. In addition, an assessment of the costs and ecological evaluation will be carried out in cooperation with the accompanying project.
Further aims of the project are to prove the applicability of an existing, non-destructive measuring method for electrode loading for dry-coated electrodes and to investigate the influence of plasma treatment of the current collector and electrode on electrode properties as adhesion and electrolyte wetting.

All technologies have the potential to significantly reduce the costs and emissions of electrode production compared to conventional processes. The results achieved in the ÖkoTroP project thus make a direct contribution to the development of economical storage technologies for mobile and stationary applications.