Capacitance behaviors of EDOT and pyrrole copolymer, and equivalent circuit model
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Date
2018
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Publisher
Taylor and Francis Ltd.
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info:eu-repo/semantics/closedAccess
Abstract
In this paper, a copolymer of 3,4-Ethylenedioxythiophene (EDOT) and pyrrole (Py) were electrochemically synthesised on glassy carbon electrode by cyclic voltammetry (CV). The modified electrodes were characterised by CV, Fourier transform infrared-Attenuated total reflectance, scanning electron microscopy, energy dispersion X-ray analysis, galvanostatic charge/discharge, electrochemical impedance spectroscopy (EIS) and stability measurements. Capacitor performances of polypyrrole (PPy), poly(3,4-ethylenedioxythiophene (PEDOT), and poly(3,4-ethylenedioxythiophene-co-pyrrole) (P(EDOT-co-Py)) films were comparatively studied in 0.5 M H2SO4 solution. In addition, the experimental and theoretical data of EIS were simulated by the equivalent circuit model of Rs(Cdl1(R1(QR2)))(Cdl2R3). The highest specific capacitances of PEDOT, PPy and P(EDOT-co-Py) films were obtained as Csp = 85, 63 and 89 mFcm?2, respectively. The highest double-layer capacitance and phase angle (?) were obtained as Cdl = 0.43 mFcm?2 and ? = 73.1° for initial feed ratio of [EDOT]0/[Py]0 = 1/50, respectively. The capacitive results of copolymers are promising electrode materials for high-performance electrical energy storage devices. © 2016 Informa UK Limited, trading as Taylor & Francis Group.
Description
Keywords
charge/dischage measurements, conducting polymers, Copolymer, electrochemical impedance spectroscopy, equivalent circuit model, specific capacitance, Aromatic compounds, Capacitance, Carbon, Circuit simulation, Circuit theory, Conducting polymers, Copolymers, Cyclic voltammetry, Digital storage, Electrochemical electrodes, Electrochemical impedance spectroscopy, Electrodes, Glass membrane electrodes, Polypyrroles, Scanning electron microscopy, Spectroscopy, Timing circuits, X ray analysis, 3 ,4 ethylenedioxythiophene (EDOT), 3 ,4-ethylenedioxythiophene, Electrical energy storage devices, Energy dispersion x-ray analysis, Equivalent circuit model, Fourier transform infrared attenuated total reflectances, Galvanostatic charge/discharge, Specific capacitance, Equivalent circuits
Journal or Series
Materials Research Innovations
WoS Q Value
Scopus Q Value
Q3
Volume
22
Issue
1
