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Effect of manganese and silver oxides on the structural and electrochemical properties of polyaniline composites
Russian version
Lobov I. A. 1, Nesov S. N. 1, Knyazev E. V. 1, Matyushenko S. A. 1, Ivlev K. E.1, Zemskov E. S.1, Grigoriev E. A.2
1Omsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Omsk, Russia
2St. Petersburg State University, St. Petersburg, Russia
Email: LI__87@mail.ru, knyazevyegor@mail.ru, nesov55@mail.ru
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This paper presents an analysis of the structure and electrochemical characteristics of composites obtained by chemical polymerization of aniline in an HReO4 solution in the presence of multi-walled carbon nanotubes (MWCNTs) pre-decorated with layers of crystalline KxMnO2 oxide and non-stoichiometric silver oxide (Ag2-xO) nanoparticles. The study was conducted using scanning and transmission electron microscopy and cyclic voltammetry. It was shown that the presence of KxMnO2 oxide on the MWCNT surface ensures the formation of polyaniline (PANI), characterized by a high rate of the leucoemeraldine/emeraldine redox reaction, while the presence of Ag2-xO nanoparticles leads to the formation of hollow PANI microspheres with a diameter of up to ~500 nm and a wall thickness of ~10 nm. This increases the rate of the n-benzoquinone/hydroquinone redox reaction, which is reflected in an increase in the specific capacitance of the material to 417.1 F/g. Keywords: nanostructured composites, conductive polymers, oxidative polymerization of aniline, metal oxides, electron microscopy.
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