Modelling of GO/PPy/CB and rGO/PPy/CB nanocomposite supercapacitors using an electrical equivalent circuit
Yükleniyor...
Dosyalar
Tarih
2021
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer Science and Business Media Deutschland GmbH
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this study, supercapacitor device performances of graphene oxide (GO), reduced graphene oxide (rGO), polypyrrole (PPy), and ternary nanocomposites of GO, PPy, and carbon black (CB) as GO/PPy/CB and rGO/PPy/CB were firstly prepared using the in situ polymerization method. The obtained composite materials were characterized by scanning electron microscopy energy–dispersive X-ray (SEM–EDX), Fourier-transform infrared-attenuated transmission reflectance (FTIR-ATR), X-ray diffraction (XRD), thermal gravimetric analysis (TGA), atomic force microscopy (AFM), Brunauer–Emmett–Teller (BET) surface area analysis, cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopic (EIS) methods. The highest specific capacitance (Csp) of the rGO/PPy/CB nanocomposite was obtained as Csp = 39, 48, and 27.86 F × g?1 by three methods of CV, GCD, and EIS, respectively. Two equivalent circuit models of Rs(CdlRct) and LRs(QRct) were presented to compare equivalent circuit parameters. Theoretical and experimental values are compatible with each other. Graphical abstract: [Figure not available: see fulltext.]. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
Açıklama
Anahtar Kelimeler
Circuit model, Hybrid supercapacitor, Nanocomposite, Polypyrrole, Reduced Graphene oxide, Atomic force microscopy, Carbon black, Cyclic voltammetry, Fourier transform infrared spectroscopy, Graphene, Gravimetric analysis, Polypyrroles, Reduced Graphene Oxide, Scanning electron microscopy, Spectroscopic analysis, Supercapacitor, Thermogravimetric analysis, Timing circuits, Attenuated transmissions, Electrical equivalent circuit, Electrochemical impedance, Equivalent circuit parameter, Fourier transform infra reds, Nanocomposite supercapacitors, Reduced graphene oxides (RGO), Thermal gravimetric analyses (TGA), Equivalent circuits
Kaynak
Ionics
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
27
Sayı
10
