Supergrowth of aligned carbon nanotubes directly on carbon papers and their properties as upercapacitors

Byungwoo Kim, Haegeun Chung, Woong Kim

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

We demonstrate that vertically aligned carbon nanotubes can be synthesized directly on conductive carbon papers and used as excellent electrochemical capacitors. The carbon nanotubes were synthesized with use of an Al/Fe catalyst via water-assisted chemical vapor deposition. They grew as fast as ∼100 μm/ min and approximately 70% of them had double walls with an average diameter of ∼6 nm. Interestingly, the carbon nanotube forest showed microscale patterns defined by the structure of underlying carbon papers. The nanotubes were attached well to the carbon papers and maintained their adhesion under mild ultrasonication in solution. Owing to the direct integration, naturally patterned structure, and good alignment, the carbon nanotubes showed excellent performance as supercapacitors. In aqueous 1 M H2SO 4 solution, specific capacitance, energy, and power measured at the current density of 20 A/g were ca. 200 F/g, 20 Wh/kg, and 40 kW/kg, respectively. A specific energy of >100 Wh/kg was achieved when organic electrolyte was used. Demonstrated facile and direct integration of carbon nanotubes on conductive substrates and their excellent electrochemical properties may hold great promise for electrochemical energy storage applications. copy;.2010 American Chemical Society.

Original languageEnglish
Pages (from-to)15223-15227
Number of pages5
JournalJournal of Physical Chemistry C
Volume114
Issue number35
DOIs
Publication statusPublished - 2010 Sep 9

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Carbon Nanotubes
Carbon nanotubes
Carbon
carbon nanotubes
carbon
electrochemical capacitors
energy storage
Electrochemical properties
microbalances
Energy storage
Nanotubes
Electrolytes
Chemical vapor deposition
nanotubes
adhesion
Capacitors
Capacitance
Current density
Adhesion
capacitance

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Supergrowth of aligned carbon nanotubes directly on carbon papers and their properties as upercapacitors. / Kim, Byungwoo; Chung, Haegeun; Kim, Woong.

In: Journal of Physical Chemistry C, Vol. 114, No. 35, 09.09.2010, p. 15223-15227.

Research output: Contribution to journalArticle

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