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Flexible, water-proof, wire-type supercapacitors integrated with wire-type UV/NO2 sensors on textiles

Authors
Kim, DaeilKeum, KayeonLee, GeumbeeKim, DoyeonLee, Sang-SooHa, Jeong Sook
Issue Date
5월-2017
Publisher
ELSEVIER SCIENCE BV
Keywords
Wire-type supercapacitor; Integrated power supply; Wire-type UV/NO2 sensor; Electronic textile
Citation
NANO ENERGY, v.35, pp.199 - 206
Indexed
SCIE
SCOPUS
Journal Title
NANO ENERGY
Volume
35
Start Page
199
End Page
206
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/83522
DOI
10.1016/j.nanoen.2017.03.044
ISSN
2211-2855
Abstract
Wire-type devices that can be integrated onto fabrics are being actively studied to meet the demands for various wearable systems. In this study, we report the fabrication of wire-type supercapacitors (WSCs) integrated with wire-type UV/NO2 sensors on textiles. The WSC consists of braided carbon fiber electrodes coated with multi-walled carbon nanotubes (MWNT)/V2O5 nanowires(NWs), a cellulose-based separator, and an ionic-liquid-based electrolyte of [EMIM][TFSI]/LiCl/Al2O3 nanoparticles. This fabricated WSC exhibited good performance with an extended potential window of 1.5 V and areal capacitance of 10.6 mF/cm(2) at 0.5 mA/cm(2). Very stable electrochemical performance of the WSC was also observed under mechanical deformations of bending, knotting, and folding. In addition, stable WSC performance in water was demonstrated by encapsulation with a thermally-shrinkable tube. Furthermore, mu-light-emitting diodes and wire-type NO2 gas and UV sensors were operated by the integrated multiple WSCs on a textile: The MWNT-coated wool wire detected NO2 gas reproducibly by increase of the current. Using spiropyran and ZnO NWs, changes in both color and photocurrent were detected upon UV irradiation. This work demonstrates the great potential of our WSC for use in wearable textile sensor systems as an efficient energy storage device.
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공과대학 (화공생명공학과)
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