The synthesis of rGO/RuO2, rGO/PANI, RuO2/PANI and rGO/RuO2/PANI nanocomposites and their supercapacitors
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Dosyalar
Tarih
2020
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Abstract: In this work, reduced graphene oxide (rGO) was obtained by chemical reduction of graphene oxide (GO) using sodium borohydride (NaBH4). Four different nanocomposites rGO/ruthenium oxide (RuO2), rGO/polyaniline (PANI), RuO2/PANI and rGO/RuO2/PANI were chemically synthesized. In addition, PANI-based nanocomposites were synthesized by in situ polymerization technique. Nanocomposites were examined by different methods such as Fourier transform infrared spectroscopy–attenuated transmission reflectance, UV–Vis spectrophotometer, scanning electron microscopy–energy-dispersive X-ray analysis, thermal analysis (TGA–DTA) and transmission electron microscopy. TGA–DTA results show that the decomposition of rGO/RuO2/PANI nanocomposite (27.2% at 788.8 °C) was less than that of rGO (1% at 779.7 °C), which confirms the successful synthesis of nanocomposites. These nanocomposites can be used in supercapacitor applications. Supercapacitor device performances were taken by cyclic voltammetry (CV), galvanostatic constant current and electrochemical impedance spectroscopy (EIS) via two-electrode configuration. Ragone plots were drawn to observe energy and power densities of supercapacitor devices. Stability tests were taken by CV method for 1000 cycles. A ternary rGO/RuO2/PANI nanocomposite yields higher specific capacitance as Csp = 723.09 F g?1 than rGO/RuO2 (Csp = 347.28 F g?1), rGO/PANI (Csp = 159.62 F g?1), RuO2/PANI (Csp = 40.2 F g?1) and rGO (Csp = 37.5 F g?1) at 2 mV/s by CV method. A new electrical circuit model of LR(C(R(CR))) was used to analyze EIS data for rGO, rGO/PANI, rGO/RuO2, RuO2/PANI and rGO/RuO2/PANI nanocomposites. These nanocomposites demonstrate remarkable properties for use as electroactive materials for supercapacitor applications. Graphic abstract: [Figure not available: see fulltext.]. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
Açıklama
Anahtar Kelimeler
Nanocomposite, Polyaniline, Power density, Ruthenium oxide, Supercapacitor, Ternary composite, Cyclic voltammetry, Electric network analysis, Electrochemical impedance spectroscopy, Energy dispersive X ray analysis, Fourier transform infrared spectroscopy, Graphene, High resolution transmission electron microscopy, Nanocomposites, Polyaniline, Scanning electron microscopy, Sodium Borohydride, Supercapacitor, Thermoanalysis, X ray diffraction analysis, Attenuated transmissions, Electrical circuit models, Electroactive material, Power densities, Reduced graphene oxides (RGO), Ruthenium oxide, Supercapacitor application, Ternary composites, Ruthenium compounds
Kaynak
Polymer Bulletin
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
77
Sayı
5
