Transparent and Flexible Supercapacitors with Single Walled Carbon Nanotube Thin Film Electrodes

YÜKSEL R., SARIOBA Z., ÇIRPAN A., Hiralal P., ÜNALAN H. E.

ACS APPLIED MATERIALS & INTERFACES, vol.6, no.17, pp.15434-15439, 2014 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 6 Issue: 17
  • Publication Date: 2014
  • Doi Number: 10.1021/am504021u
  • Journal Name: ACS APPLIED MATERIALS & INTERFACES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.15434-15439
  • Keywords: supercapacitors, single walled carbon nanotubes, transparent, flexible, polydimethylsiloxane, thin film, FABRICATION, POLYDIMETHYLSILOXANE, DEVICES, DESIGN, ENERGY
  • Middle East Technical University Affiliated: Yes

Abstract

We describe a simple process for the fabrication of transparent and flexible, solid-state supercapacitors. Symmetric electrodes made up of binder-free single walled carbon nanotube (SWCNT) thin films were deposited onto polydimethylsiloxane substrates by vacuum filtration followed by a stamping method, and solid-state supercapacitor devices were assembled using a gel electrolyte. An optical transmittance of 82% was found for 0.02 mg of SWCNTs, and a specific capacitance of 22.2 F/g was obtained. The power density can reach to 41.5 kW.kg(1) and shows good capacity retention (94%) upon cycling over 500 times. Fabricated supercapacitors will be relevant for the realization of transparent and flexible devices with energy storage capabilities, displays and touch screens in particular.