Bauer, ChristianNeff, TobiasDay, AdamKrueger, Anke2024-10-312024-10-3120242566-62232566-62231908238070http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-151881http://elib.uni-stuttgart.de/handle/11682/15188http://dx.doi.org/10.18419/opus-15169The increasing usage of electrical energy storage solutions demands for cost effective, scalable and sustainable manufacturing technologies. Deposition of functional inks, carrying electrochemically active materials is a suitable technique as it delivers material with selected properties only to required locations. However, the production of stable dispersions featuring high concentrations of active material ‐ necessary for effective deposition ‐ is challenging. Here we present an approach to print supercapacitor electrodes with onion‐like carbon as active material, using a simple, cost‐effective process as well as a water‐based ink. The ink is highly stable and can be deposited by spray and inkjet techniques. The fabricated electrodes offer a capacitance of up to 14 mF cm -2 (27 F g -1 ) and retained 97 % of their initial capacitance after 5000 cycles, demonstrating excellent performance and stability of the coating.eninfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/4.0/540article2024-10-15