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Laboratory filter paper as substrate material for flexible supercapacitors

Abstract

In this study, a flexible asymmetrical solid state filter paper-based supercapacitor was fabricated. The common laboratory filter paper (FP) provides the key toughness and flexibility for the whole device. Simply, the traditional electroless Ni plating and electro-deposition were introduced to change the electrical conductivity of FP as 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 positive electrode and Ni/AC-FP as negative electrode. And they were separated by a piece of FP coated with ionic gel electrolyte to assemble the flexible asymmetrical solid-state supercapacitors. Such a supercapacitor exhibits superior flexibility, large volume energy density (0.64 mWh/cm3) and well bending cycle performance (95.89% capacitance retention after 500 bending cycles). It has been demonstrated that assembled supercapacitor can still power a red light-emitting diode (LED) indicator normally regardless of what bending state and bending frequency it suffers from. This study may provide a promising insight for designing and fabricating the flexible asymmetrical solid-state supercapacitor in flexible power supply for wearable and portable applications.

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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, 2017, Accepted Manuscript
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    Laboratory filter paper as substrate material for flexible supercapacitors

    L. Zhang, X. Yu, P. Zhu, F. Zhou, G. Li, R. Sun and C. Wong, Sustainable Energy Fuels, 2017, Accepted Manuscript , DOI: 10.1039/C7SE00411G

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