Abstract
A method has been developed for synthesis of a composite coating based on polyaniline by introducing dispersed IR-pyrolyzed polyacrylonitrile, activated by alkaline treatment, into a polymer matrix. The coating is applied from a suspension in formic acid onto a graphite foil that has been previously subjected to anodic etching to improve the wettability with an electrolyte. The produced composite electrodes for sulfuric acid supercapacitors demonstrate high stability during long-term cycling. The specific electrochemical capacitance was 0.89 F cm–2, which is more than 2 times higher than that for an electrode with a polyaniline coating (0.41 F cm–2) tested under the same conditions. The main contribution to the increase in the total capacitance is made by the double-layer capacitance due to the rise in the active electrode surface.
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This work was carried out within the State Program of of the Institute of Petrochemical Synthesis A.V. Topchiev of the Russian Academy of Sciences and the state assignment of the Institute of Problems of Chemical Physics of the Russian Academy of Sciences AAAA-A19-119071190044-3.
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Abalyaeva, V.V., Nikolaeva, G.V., Efimov, M.N. et al. Composites Based on Polyaniline and Activated IR-Pyrolyzed Polyacrylonitrile As Promising Supercapacitor Electrode Materials. Russ J Appl Chem 93, 1667–1674 (2020). https://doi.org/10.1134/S1070427220110063
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DOI: https://doi.org/10.1134/S1070427220110063