All-solid-state flexible micro-supercapacitor arrays with patterned graphene/MWNT electrodes

Junyeong Yun; Daeil Kim; Geumbee Lee; Jeong Sook Ha

doi:10.1016/j.carbon.2014.07.055

All-solid-state flexible micro-supercapacitor arrays with patterned graphene/MWNT electrodes

Junyeong Yun, Daeil Kim, Geumbee Lee, Jeong Sook Ha

Department of Chemical and Biological Engineering

Research output: Contribution to journal › Article › peer-review

101 Citations (Scopus)

Abstract

We report on the fabrication of all-solid-state flexible micro-supercapacitor (MSC) arrays with electrodes consisting of patterned multilayer graphene (MG) and functionalized multi-walled carbon nanotubes (MWNTs), and polyvinyl alcohol (PVA)-H₃PO₄ gel electrolyte. The fabricated MSC exhibited areal capacitance of 2.54 mF/cm² at a scan rate of 10 mV/s, which is ∼150 times higher than that of MSC with MG electrode. The areal energy and power density were also dramatically improved via using MG/MWNT electrodes. In addition, there was no deterioration of the electrical performance over repetitive convex and concave bending with a bending radius of 2.3 mm. Furthermore, both the output voltage and the total capacitance of the MSC could be controlled via the serial or parallel connection of multiple planar-type MSCs to operate high-voltage light-emitting diodes.

Original language	English
Pages (from-to)	156-164
Number of pages	9
Journal	Carbon
Volume	79
Issue number	1
DOIs	https://doi.org/10.1016/j.carbon.2014.07.055
Publication status	Published - 2014 Jan 1

ASJC Scopus subject areas

Chemistry(all)

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10.1016/j.carbon.2014.07.055

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title = "All-solid-state flexible micro-supercapacitor arrays with patterned graphene/MWNT electrodes",

abstract = "We report on the fabrication of all-solid-state flexible micro-supercapacitor (MSC) arrays with electrodes consisting of patterned multilayer graphene (MG) and functionalized multi-walled carbon nanotubes (MWNTs), and polyvinyl alcohol (PVA)-H3PO4 gel electrolyte. The fabricated MSC exhibited areal capacitance of 2.54 mF/cm2 at a scan rate of 10 mV/s, which is ∼150 times higher than that of MSC with MG electrode. The areal energy and power density were also dramatically improved via using MG/MWNT electrodes. In addition, there was no deterioration of the electrical performance over repetitive convex and concave bending with a bending radius of 2.3 mm. Furthermore, both the output voltage and the total capacitance of the MSC could be controlled via the serial or parallel connection of multiple planar-type MSCs to operate high-voltage light-emitting diodes.",

author = "Junyeong Yun and Daeil Kim and Geumbee Lee and Ha, {Jeong Sook}",

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AU - Yun, Junyeong

AU - Kim, Daeil

AU - Lee, Geumbee

AU - Ha, Jeong Sook

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