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Electrochemical Properties of the Ultrasonically Activated Thermally Expanded Graphite–Polyaniline Hybrid Material
Author(s) -
Fedorovskaya Ekaterina O.,
Bulusheva Lyubov G.,
Smirnov Dmitry A.,
Okotrub Alexander V.
Publication year - 2018
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201700516
Subject(s) - polyaniline , materials science , graphite , chemical engineering , electrolyte , x ray photoelectron spectroscopy , polyaniline nanofibers , ammonium persulfate , raman spectroscopy , aniline , aqueous solution , polymer , chemistry , electrode , composite material , organic chemistry , engineering , polymerization , physics , optics
Thermally expanded graphite (TEG) is used as a template for precipitation of polyaniline from an aqueous solution of aniline hydrochloride and sodium persulfate used as an oxidant. In the first case, the TEG sample is used without treatment, in the second case the TEG sample is activated by ultrasonication before the polyaniline precipitation. Raman spectroscopy shows the formation of polymer layers on the surface of graphene layers. Near‐edge X‐ray absorption fine structure and X‐ray photoelectron spectroscopy reveal the influence of the TEG ultrasonication on the chemical state of polyaniline in the hybrid. This material shows a large specific capacitance in a 1 M H 2 SO 4 electrolyte due to the Faradaic processes in the polyaniline and high stability during the cycling.