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Electrochemical characteristics of electrode materials based on polyaniline and multi-walled carbon nanotubes decorated with manganese oxide
Lobov I. A.
1, Davletkildeev N. A.
1, Nesov S. N.
1
1Omsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Omsk, Russia
Email: LI__87@mail.ru, nesov55@mail.ru
In this work, the electrochemical characteristics of polyaniline composites with multi-walled carbon nanotubes (original and decorated with manganese oxide) were studied using cyclic voltammetry and galvanostatic cycling. The composites were synthesized by in-situ chemical oxidative polymerization of aniline in rhenium acid. The composite containing manganese oxide showed higher specific capacitance values (308 versus 238 F/g at 1 A/g) and better self-discharge characteristics (voltage drop 5% versus 20% in 1 h). After 1000 charge/discharge cycles, the specific capacity of both composites decreases by 13% due to the incomplete reversibility of the leucoemeraldine/emeraldine redox reactions. Keywords: polyaniline, carbon nanotubes, manganese oxide, composites, supercapacitors.
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