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

Daeil Kim, Kayeon Keum, Geumbee Lee, Doyeon Kim, Sang-Soo Lee, Jeong Sook Ha

Research output: Contribution to journalArticle

18 Citations (Scopus)

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/cm2 at 0.5 mA/cm2. 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, μ-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 photo-current 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.

Original languageEnglish
Pages (from-to)199-206
Number of pages8
JournalNano Energy
Volume35
DOIs
Publication statusPublished - 2017 May 1

Fingerprint

Textiles
Wire
Water
Sensors
Carbon Nanotubes
Nanowires
Carbon nanotubes
Supercapacitor
Gases
Ionic Liquids
Separators
Wool
Encapsulation
Ionic liquids
Cellulose
Energy storage
Electrolytes
Carbon fibers
Light emitting diodes
Capacitance

Keywords

  • Electronic textile
  • Integrated power supply
  • Wire-type supercapacitor
  • Wire-type UV/NO sensor

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

Cite this

Flexible, water-proof, wire-type supercapacitors integrated with wire-type UV/NO2 sensors on textiles. / Kim, Daeil; Keum, Kayeon; Lee, Geumbee; Kim, Doyeon; Lee, Sang-Soo; Ha, Jeong Sook.

In: Nano Energy, Vol. 35, 01.05.2017, p. 199-206.

Research output: Contribution to journalArticle

Kim, Daeil ; Keum, Kayeon ; Lee, Geumbee ; Kim, Doyeon ; Lee, Sang-Soo ; Ha, Jeong Sook. / Flexible, water-proof, wire-type supercapacitors integrated with wire-type UV/NO2 sensors on textiles. In: Nano Energy. 2017 ; Vol. 35. pp. 199-206.
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