Browsing by Author "Day, Adam"

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    Scalable fabrication of flexible supercapacitor electrodes using sustainable water‐based onion‐like carbon inks
    (2024) Bauer, Christian; Neff, Tobias; Day, Adam; Krueger, Anke
    The 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.