Roll-to-roll synthesis of vertically aligned carbon nanotube electrodes for electrical double layer capacitors


Arcila-Velez M. R. , Zhu J., Childress A., KARAKAYA M. , Podila R., Rao A. M. , ...More

NANO ENERGY, vol.8, pp.9-16, 2014 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 8
  • Publication Date: 2014
  • Doi Number: 10.1016/j.nanoen.2014.05.004
  • Title of Journal : NANO ENERGY
  • Page Numbers: pp.9-16
  • Keywords: Roll-to-roll synthesis, Chemical vapor deposition, Vertically aligned carbon nanotubes, Supercapacitor, Ultracapacitor, GROWTH, ENERGY

Abstract

Research in carbon nanomaterials has seen tremendous growth in recent years; however, technological advances are limited by the lack of continuous and scalable synthesis methods. Here we present a scalable roll-to-roll process for synthesizing vertically-aligned multi-walled carbon nanotubes (VACNTs) on Al foil ribbons which are continuously drawn through a chemical vapor deposition (CVD) reactor operating at ambient pressure and a relatively low growth temperature (600 degrees C). Electrodes comprised of VACNT forests synthesized in this process are directly assembled into supercapacitor cells, which yield high power densities (1270 W/kg) and energy densities (11.5 Wh/kg). These devices exhibit excellent cycle stability with no loss in performance over more than a thousand cycles. (C) 2014 Elsevier Ltd. All rights reserved.