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Laboratory filter paper as a substrate material for flexible supercapacitors

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Abstract

In this study, a flexible asymmetrical solid-state filter paper-based supercapacitor was fabricated. Common laboratory filter paper (FP) provides toughness and flexibility to the whole device. Simply, traditional electroless Ni plating and electro-deposition were introduced to change the electrical conductivity of FP as a flexible and conductive substrate material. Then, the electrochemical active material Co(OH)2 and active carbon (AC) were respectively coated on the conductive Ni paper through electro-deposition and physical coating methods to prepare Ni/Co(OH)2-FP as a positive electrode and Ni/AC-FP as a negative electrode. Moreover, they were separated by a piece of FP coated with an ionic gel electrolyte to assemble the flexible asymmetrical solid-state supercapacitors. This supercapacitor exhibits superior flexibility, large volume energy density (0.64 mW h cm−3), and good bending cycle performance (95.89% capacitance retention after 500 bending cycles). It has been demonstrated that the assembled supercapacitor can still power a red light-emitting diode (LED) indicator normally regardless of the bending state and bending frequency. This study may provide promising insights for the design and fabrication of a flexible asymmetrical solid-state supercapacitor in a flexible power supply for wearable and portable applications.

Graphical abstract: Laboratory filter paper as a substrate material for flexible supercapacitors

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Publication details

The article was received on 23 Aug 2017, accepted on 06 Oct 2017 and first published on 06 Oct 2017


Article type: Paper
DOI: 10.1039/C7SE00411G
Citation: Sustainable Energy Fuels, 2018, Advance Article
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    Laboratory filter paper as a substrate material for flexible supercapacitors

    L. Zhang, X. Yu, P. Zhu, F. Zhou, G. Li, R. Sun and C. Wong, Sustainable Energy Fuels, 2018, Advance Article , DOI: 10.1039/C7SE00411G

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