Synthesis of rGO/nanoclay/PVK nanocomposites, electrochemical performances of supercapacitors
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Dosyalar
Tarih
2019
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Taylor & Francis Inc
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this study, graphene oxide (GO) was chemically reacted with sodium borohydride (NaBH4) to form reduced graphene oxide (rGO). rGO, Montmorillonite nanoclay, and polyvinylcarbazole (PVK) were used to form a ternary nanocomposite via chemical reaction. These nanocomposite qualities were described via scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDX), Fourier transform infrared spectroscopy-attenuated transmission reflectance (FTIR-ATR). In addition, these materials were used in supercapacitor device as an active material to test electrochemical performances via cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS). The rGO/nanoclay/PVK nanocomposite shows significantly improved specific capacitance (C-sp = 168.64 Fg(-1)) compared to that of rGO (C-sp = 63.26 Fg(-1)) at the scan rate of 10 mVs(-1) by CV method. The enhanced capacitance results in high power density (P = 5522.6 Wkg(-1)) and energy density (E = 28.84 Whkg(-1)) capabilities of the rGO/nanoclay/PVK nanocomposite material. The addition of nanoclay and PVK increased the specific capacitance of rGO material due to a dopant effect for supercapacitor studies. Ragone plots were drawn to observe energy and power density of supercapacitor devices. The C-sp of rGO/nanoclay/PVK nanocomposite has only 86.4% of initial capacitance for charge/discharge performances obtained by CV method for 5000 cycles. [GRAPHICS] .
Açıklama
Anahtar Kelimeler
Polyvinylcarbazole, nanoclay, reduced graphene oxide, energy storage, charge/discharge, Microwave-Assisted Synthesis, Graphene Oxide Nanosheets, Electrode Material, Hydrothermal Synthesis, Room-Temperature, Ag Nanoparticles, Polyaniline, Composite, Fabrication, Polymer
Kaynak
Polymer-Plastics Technology and Materials
WoS Q Değeri
Q4
Scopus Q Değeri
Q2
Cilt
58
Sayı
14
