rGO / MnO2 / Polyterthiophene ternary composite: pore size control, electrochemical supercapacitor behavior and equivalent circuit model analysis

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Küçük Resim

Tarih

2020

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

Springer

Erişim Hakkı

info:eu-repo/semantics/closedAccess

Özet

In this work, a new electrode active materials including reduced graphene oxide (rGO), Manganese dioxide (MnO2) / polyterthiophene (PTTh) has been synthesized as a nanocomposite using in-situ polymerization method, microwave-assisted method for obtaining reduced graphene oxide and chemical synthesis of metal-oxide for supercapacitor devices. A ternary nanocomposites of rGO/MnO2/PTTh were characterized by the analysis of Fourier transform infrared-attenuated transmission reflectance (FTIR-ATR), Raman spectroscopy, scanning electron microscopy-energy dispersion X-ray analysis (SEM-EDX), transmission electron microscopy (TEM), thermal-gravimetric analysis (TGA-DTA), Brunauer-Emmett Teller (BET) pore analysis, Ultraviolet-visible (UV-vis) spectrophotometer, X-ray diffraction (XRD) analysis, electrochemical impedance spectroscopy (EIS), galvanostatic charge/discharge (GCD), and cyclic voltammetry (CV). The highest specific capacitance (Csp) was obtained as Csp = 908.86 F/g for rGO/MnO2/PTTh nanocomposite at 1 mV/s for [MnO2]o/[TTh]o = 1/3. Moreover, equivalent electrical circuit model of LR(QR) was chosen to interpret EIS analysis of supercapacitor device. rGO/MnO2/PTTh nanocomposite has both electrochemical double-layer capacitance and pseudocapacitance due to the fast and reversible redox processes related to the ?-conjugated polymer chains. [Figure not available: see fulltext.] © 2020, The Polymer Society, Taipei.

Açıklama

Anahtar Kelimeler

Circuit model, Manganese dioxide, Nanocomposite, Polyterthiophene, Reduced graphene oxide, Supercapacitor, Capacitance, Circuit simulation, Conjugated polymers, Cyclic voltammetry, Electrochemical electrodes, Electrochemical impedance spectroscopy, Energy dispersive X ray analysis, Fourier transform infrared spectroscopy, Graphene, Gravimetric analysis, High resolution transmission electron microscopy, Manganese oxide, Metals, Pore size, Reduced Graphene Oxide, Scanning electron microscopy, Supercapacitor, Thermogravimetric analysis, Timing circuits, Transmissions, X ray diffraction analysis, Electrochemical supercapacitor, Energy dispersion x-ray analysis, Equivalent electrical circuit model, Fourier transform infra reds, Galvanostatic charge/discharge, Microwave-assisted methods, Reduced graphene oxides (RGO), Thermal gravimetric analysis, Equivalent circuits

Kaynak

Journal of Polymer Research

WoS Q Değeri

Q2

Scopus Q Değeri

Q2

Cilt

27

Sayı

8

Künye