All-solid-state flexible supercapacitors based on papers coated with carbon nanotubes and ionic-liquid-based gel electrolytes

Yu Jin Kang, Haegeun Chung, Chi Hwan Han, Woong Kim

Research output: Contribution to journalArticle

191 Citations (Scopus)

Abstract

All-solid-state flexible supercapacitors were fabricated using carbon nanotubes (CNTs), regular office papers, and ionic-liquid-based gel electrolytes. Flexible electrodes were made by coating CNTs on office papers by a drop-dry method. The gel electrolyte was prepared by mixing fumed silica nanopowders with ionic liquid, 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIM][NTf 2]). This supercapacitor showed high power and energy performance as a solid-state flexible supercapacitor. The specific capacitance of the CNT electrodes was 135Fg 1 at a current density of 2Ag 1, when considering the mass of active materials only. The maximum power and energy density of the supercapacitors were 164kWkg 1 and 41Whkg 1, respectively. Interestingly, the solid-state supercapacitor with the gel electrolyte showed comparable performance to the supercapacitors with ionic-liquid electrolyte. Moreover, the supercapacitor showed excellent stability and flexibility. The CNT/paper-and gel-based supercapacitors may hold great potential for low-cost and high-performance flexible energy storage applications.

Original languageEnglish
Article number065401
JournalNanotechnology
Volume23
Issue number6
DOIs
Publication statusPublished - 2012 Feb 17

Fingerprint

Ionic Liquids
Carbon Nanotubes
Ionic liquids
Electrolytes
Carbon nanotubes
Gels
Electrodes
Silicon Dioxide
Costs and Cost Analysis
Supercapacitor
Energy storage
Capacitance
Current density
Silica
Coatings

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Cite this

All-solid-state flexible supercapacitors based on papers coated with carbon nanotubes and ionic-liquid-based gel electrolytes. / Kang, Yu Jin; Chung, Haegeun; Han, Chi Hwan; Kim, Woong.

In: Nanotechnology, Vol. 23, No. 6, 065401, 17.02.2012.

Research output: Contribution to journalArticle

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