Investigation of Physicochemical and Electrochemical Properties of Single-Walled Carbon Nanotubes Modified with Nitrogen

V. V. Chesnokov; A. S. Chichkan; A. V. Puzynin; D. A. Svintsitsky; Z. R. Ismagilov; V. N. Parmon

doi:10.18321/ectj676

Authors

V. V. Chesnokov Boreskov Institute of Catalysis SB RAS, Prosp. Akad. Lavrentieva 5, Novosibirsk 630090, Russia
A. S. Chichkan Institute of Coal Chemistry and Materials Science of Federal Research Center of Coal and Coal Chemistry SB RAS, Prosp. Sovetsky 18, Kemerovo 650000, Russia
A. V. Puzynin Institute of Coal Chemistry and Materials Science of Federal Research Center of Coal and Coal Chemistry SB RAS, Prosp. Sovetsky 18, Kemerovo 650000, Russia
D. A. Svintsitsky Boreskov Institute of Catalysis SB RAS, Prosp. Akad. Lavrentieva 5, Novosibirsk 630090, Russia
Z. R. Ismagilov Boreskov Institute of Catalysis SB RAS, Prosp. Akad. Lavrentieva 5, Novosibirsk 630090, Russia
V. N. Parmon Boreskov Institute of Catalysis SB RAS, Prosp. Akad. Lavrentieva 5, Novosibirsk 630090, Russia

DOI:

https://doi.org/10.18321/ectj676

Keywords:

supercapacitors; carbon nanotubes; modification; nitrogen; electrochemical properties

Abstract

Composites of the type “nitrogen-containing carbon coating – single-walled carbon nanotubes” were obtained by the treatment of single-walled carbon nanotubes (SWCNT) in a gaseous 40%NH₃-1%C₂H₂-C₂H₄ mixture at temperatures 600–750 °C. Single-walled carbon nanotubes etched in aqua regia (SWCNT_et) and doped with nitrogen (N-SWCNT) were studied by XPS, electron microscopy and IR spectroscopy. Various oxygen-containing functional groups were found to reside on the surface of initial SWCNT_et. Upon treatment of SWCNTet in 40%NH3-1%С₂Н₂-C₂H₄, polymerization and condensation of hydrocarbons resulted in the formation of a thin nitrogen-containing carbon coating. Specific capacitance per a weight of initial and nitrogen-doped carbon nanotubes in an aqueous electrolyte with 1 M H₂SO₄ was measured. Specific capacitance of carbon electrodes was found to change symbately with the content of nitrogen-containing functional groups on the SWCNT surface.

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