The study of morphology and electrochemical properties of supercapacitor working electrode based on multi-walled carbon nanotubes doped with nitrogen
In this work, we study the morphology, structure, specific surface area, conductivity, and electrochemical properties of the supercapacitor working electrodes prepared based on undoped and nitrogen-doped multi-walled carbon nanotubes (MWCNTs). It is shown that nitrogen-doped MWCNTs have a larger...
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| Main Author: | |
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| Format: | Article |
| Language: | English |
| Published: |
Omsk State Technical University, Federal State Autonoumos Educational Institution of Higher Education
2020-09-01
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| Series: | Омский научный вестник |
| Subjects: | |
| Online Access: | https://www.omgtu.ru/general_information/media_omgtu/journal_of_omsk_research_journal/files/arhiv/2020/4%20(172)/80-84%20%D0%9A%D0%BE%D1%80%D1%83%D1%81%D0%B5%D0%BD%D0%BA%D0%BE%20%D0%9F.%20%D0%9C..pdf |
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| Summary: | In this work, we study the morphology, structure, specific
surface area, conductivity, and electrochemical properties of the
supercapacitor working electrodes prepared based on undoped
and nitrogen-doped multi-walled carbon nanotubes (MWCNTs).
It is shown that nitrogen-doped MWCNTs have a larger specific
surface area and conductivity than MWCNTs due to the presence
of structural defects and functional groups on their surface. Using
scanning electron microscopy, it is shown that the electrodes
formed based on undoped and nitrogen-doped MWCNTs have
a porous structure, which ensures the penetration of electrolyte
into the volume of the electrodes. A comparative analysis of the
electrochemical characteristics of the supercapacitor electrodes
in a unipolar acid electrolyte H2SO4
is carried out. Using cyclic
voltammetry, it is shown that the high specific capacitance of the electrode based on nitrogen-doped MWCNTs at low scan rates is
due to the additional contribution of Faraday processes involving
structural defects, functional oxygen-containing and nitrogencontaining groups on the surface of nanotubes. |
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| ISSN: | 1813-8225 2541-7541 |