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عنوان
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Reduced graphene Oxide/Poly(1,5 dihydroxynaphthalene)/TiO2 nanocomposite conducting polymer coated on gold as a supercapacitor electrode
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نوع پژوهش
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مقاله چاپشده در مجلات علمی
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کلیدواژهها
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Reduced graphene oxide Poly (1, 5-dihydroxynaphthalene) TiO2 Supercapacitor
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چکیده
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novel reduced graphene oxide/poly(1,5-dihydroxynaphthalene)/TiO2 (RGO/PDHN/TiO2) ternary nanocomposite conducting polymer is electrochemically synthesized on gold electrodes for supercapacitor applications. The RGO/PDHN/TiO2 nanocomposite polymer film is characterized by fieldemission scanning electron microscopy (FESEM), Fourier transform infrared spectra (FT-IR), and energy dispersive X-ray spectrometry (EDX) and X-ray diffraction (XRD). The electrochemical performance of the nanocomposite polymer-modified electrode in 1.0M HClO4 is investigated by various electrochemical methods such as cyclic voltammetry (CV), galvanostatic charge-discharge, and electrochemical impedance spectroscopy (EIS). The RGO/PDHN/TiO2 nanocomposite polymer film in a three-electrode system exhibits a large specific capacitance of 556 F g1 in comparison with those obtained using RGO/PDHN (432 F g1) and PDHN (223 F g1) at a current density of 2.4 A g1. Simultaneous usage of the electrical double layer capacitance (EDLC) of RGO with the pseudocapacitive behavior of PDHN and TiO2 results in the large specific capacitance in RGO/PDHN/TiO2. The electrochemical self-stabilities of RGO/ PDHN/TiO2, RGO/PDHN, and PDHN polymer films are investigated by continuous cycling between 0.20 e0.45 V. The RGO/PDHN/TiO2 nanocomposite yields longer self-stability than that of other polymers after 1700 cycles and maintains about 74% of the initial capacitance values
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پژوهشگران
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المیرا عزیزی (نفر اول)، جلال ارجمندی (نفر دوم)، جین یونگ لی (نفر سوم)
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