Physics of the Solid State
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- 2023
- 2022
The effect of heat treatment on the structure and electrochemical characteristics of composite based on multi-walled carbon nanotubes and manganese oxide
Nesov S. N.
1,2, Sten’kin Yu. A.
2, Korusenko P. M.
1,3, Bolotov V. V.1,2, Matyushenko S. A.1,2
1Omsk State Technical University, Omsk, Russia
2Omsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Omsk, Russia
3St. Petersburg State University, St. Petersburg, Russia
2Omsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Omsk, Russia
3St. Petersburg State University, St. Petersburg, Russia
Email: nesov55@mail.ru, ros614@mail.ru, korusenko_petr@mail.ru, val.bolotov@mail.ru, sergey199622@mail.ru
In this paper, the effect of heat treatment in an inert medium on the structure and electrochemical characteristics of a composite based on multi-walled carbon nanotubes (MWCNTs) and manganese oxide formed by deposition from a KMnO4 solution is investigated. As a result of heat treatment composite (500oC) in argon on the surface of multi-walled carbon nanotubes are formed nanoparticles of non-stoichiometric manganese oxide. X-ray photoelectron spectroscopy data indicate a high degree of functionalization of the surface of carbon nanotubes by oxygen-containing groups, as well as the possible formation chemical bonds at the interfaces of the composite. Electrochemical measurements showed that the specific capacity of the composite after heat treatment (~88-50 F/g) exceeds the capacity of the original MWCNTs (18-15 F/g) in the current range discharge 0.1-1 A/g. Keywords: supercapacitors, 1D-structure, hydrothermal decomposition, charge-discharge characteristics. DOI: 10.61011/PSS.2023.08.56588.135
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