Proceedings of Online nanoGe Fall Meeting 20 (OnlineNFM20)
Publication date: 4th October 2020
In recent year, in response to the request for flexible and sustainable energy storage devices with high electrochemical performance, there has been growing interest in using paper or paper-like substrates for batteries and other energy storage devices such as environmentally friendly supercapacitors [1]. In this context, cellulose-based substrates for energy storage devices could be well-engineered, are light-weight, safe, thin and flexible[2]. We demonstrated a scalable, low cost and easy-to-process approach for the preparation of energy storage devices using large area techniques like spray and blade coating, suitable for smart electronic applications for health monitoring. Following a green strategy, all components were formulated in water-based dispersions. Symmetric paper-based supercapacitors using common copy paper and electronic paper as substrate, and Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) as electrodes, are realized and investigated. The novelty of this work consists in the use of composite based on detonation nanodiamonds (DNDs) and hydroxypropyl cellulose (HPC) as solid state electrolyte and separator. We also prepared devices with solution electrolyte using the same HPC+DND composite but with the addition of sodium sulfate (Na2SO4). The performance obtained using solid electrolyte (HPC+DNDs) and liquid electrolyte (HPC+DNDs+Na2SO4) on both substrates are comparable in terms of specific capacitance: ~ 0,13 ÷ 0,52 F/g for (HPC+DNDs) and ~ 0,35 ÷ 0,82 F/g for (HPC+ND+Na2SO4), with power density in the range of ~19 ÷ 24 µW cm-2[3].
The authors acknowledge the European H2020 project, “Wearable Applications enabled by electronic Systems on Paper (WASP)” (grant no. 825213). This publication reflects only the authors’ views, and the European Union is not liable for any use that may be made of the information contained therein.
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