Copolymer formation of 4-vinylbenzyl-9H-carbazole-9-carbodithioate and ethylenedioxythiophene and capacitive behavior
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Dosyalar
Tarih
2014
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Sage Publications Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this study, first, a new monomer of 4-vinylbenzyl 9H-carbazole-9-carbodithioate (VBzCzCT) was chemically synthesized and characterized using Fourier transform infrared (FTIR) reflectance, proton nuclear magnetic resonance (1 H NMR), and carbon nuclear magnetic resonance (C-13 NMR) spectroscopies. Second, VBzCzCT and 3,4-ethylenedioxythiophene (EDOT) monomers were electrocopolymerized (VBzCzCT-co-EDOT) in 0.1 M sodium perchlorate (NaClO4)/acetonitrile ((CHCN)-C-3) on glassy carbon electrode (GCE) using cyclic voltammetry (CV). Third, the best deposition conditions on the electroactivity of the modified homopolymers and copolymer were studied and characterized using different techniques such as CV, FTIR-attenuated total reflectance, scanning electron microscopyenergy dispersion x-ray analysis, and electrochemical impedance spectroscopy (EIS) analysis. The specific capacitance (C-sp) of poly(VBzCzCT) (P(VBzCzCT)) was obtained as 20.5 mF cm(-2). However, the C-sp of P(VBzCzCT-co-EDOT)/GCE was obtained as 45.5 mF cm(-2). There is an important improvement in the capacitance value of copolymer formation. The C-sp value increases more than twice from P(VBzCzCT) to copolymer. The highest double layer capacitance (C-dl approximately 27.5 mF cm(-2)) was obtained for P(VBzCzCT-co-EDOT) and P(EDOT) compared with P(VBzCzCT) (C-dl approximately 8.28 mF cm(-2). Finally, simulation graphs of Nyquist, Bode-magnitude, and Bode-phase plots were given for homopolymers and copolymer for the electrical equivalent circuit model of R-s(Q(1)(R-1(C-1(R-2(C-2(R-3.W))))))(C3R4). The EIS results of P(VBzCzCT), P(EDOT), and P(VBzCzCT-co-EDOT) might be studied as promising active electrode materials for (super) capacitor evaluations.
Açıklama
Anahtar Kelimeler
4-Vinylbenzyl 9H-carbazole-9-carbodithioate, electrochemical impedance spectroscopy, electrolyte, electropolymerization, circuit model, Electrochemical Impedance Spectroscopy, Transfer Raft Polymerization, Free-Radical Polymerization, Carbon, Polypyrrole, Carbazole, Poly(3,4-Ethylenedioxythiophene), Polyaniline, Composites, Films
Kaynak
High Performance Polymers
WoS Q Değeri
Q3
Scopus Q Değeri
Q3
Cilt
26
Sayı
5
