The aim of the NERO project is to develop and demonstrate high-energy, high-power lithium-ion cells in industry-relevant cell formats, in order to optimize both power output and energy density based on high-capacity anode and cathode materials.
Within the project, two approaches to improving cell performance compared to the current state of the art are being investigated and their respective advantages and disadvantages are scientifically evaluated:
- High-voltage approach:
Use of cells with a single-crystal NMC cathode with a medium nickel content (Ni = 60%), operated at an increased cutoff voltage (up to 4.5 V). The goal is to increase the degree of delithiation and thus the cathode capacity. - Ultra-high-nickel approach:
Use of an ultra-high-Ni NMC material (Ni = 91%), which offers a higher specific capacity compared to materials with lower nickel content. These cells are operated at a standard cutoff voltage.
In both approaches, next-generation silicon composite materials are used as anodes to further increase energy density compared to conventional graphite-based systems.
Currently, the commercial viability of these active material combinations is mainly limited by insufficient cycle life due to electrolyte degradation. Tailored electrolytes are therefore a key enabler for unlocking the full potential of these concepts.
Both optimization strategies are tested in pouch and cylindrical cells and adapted for different application areas.
Project Partners
- VARTA Microbattery GmbH
- V4Smart GmbH & Co. KG
- ANDREAS STIHL AG & Co. KG
- Technical University of Munich – Chair of Electrical Energy Storage Technology (EES)
- Technical University of Munich – Heinz Maier-Leibnitz Research Neutron Source (FRM II)
- Technical University of Munich – Institute for Machine Tools and Industrial Management (iwb)
- Technical University of Munich – Chair of Technical Electrochemistry (TEC)
