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Electroless nano zinc oxide-activate carbon composite supercapacitor electrode

Faraji, Soheila and Ani, Farid Nasir (2016) Electroless nano zinc oxide-activate carbon composite supercapacitor electrode. Journal of Electroceramics, 36 (42373). pp. 122-128. ISSN 385-3449

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Official URL: http://dx.doi.org/10.1007/s10832-016-0017-2

Abstract

An electroless deposition process was used to synthesize the nanostructured zinc oxide (ZnO)-activated carbon (AC) as supercapacitor. The composite oxide was studied by high resolution transmission electron microscopy (HRTEM), scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction analysis (XRD). The electrochemical performance of the nanocomposite was analyzed through cyclic voltammetry (CV) and AC impedance spectroscopy (EIS) in 0.1 M Na2SO4 as electrolyte. A specific capacitance 187 F g(-1) at a scan rate of 5 mV s(-1) was obtained using cyclic voltammetry (CV) and a nearly rectangular shaped CV curve was observed for the composite oxide. The supercapacitor was quite stable during charge-discharge cycling and exhibited constant capacitance during the long-term cycling. It also yielded a specific capacitance 171 F g(-1) at 5 mA cm(-2) with a high energy density of 21.9 Wh kg(-1) and 4.2 kW kg(-1) of power density. Due to unique structure of prepared ZnO-AC nanocomposite, it is a promising candidate for supercapacitor.

Item Type:Article
Uncontrolled Keywords:activated carbon, supercapacitor
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Mechanical Engineering
ID Code:69357
Deposited By: Siti Nor Hashidah Zakaria
Deposited On:22 Nov 2017 00:45
Last Modified:22 Nov 2017 00:45

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