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http://dx.doi.org/10.9728/dcs.2017.18.6.1199

Characterization of manganese oxide supercapacitors using carbon cloth  

Lee, Seung Jin (School of Electronics and Computer Engineering, Chonnam National University,)
Kim, Chihoon (School of Electronics and Computer Engineering, Chonnam National University,)
Ji, Taeksoo (School of Electronics and Computer Engineering, Chonnam National University,)
Publication Information
Journal of Digital Contents Society / v.18, no.6, 2017 , pp. 1199-1205 More about this Journal
Abstract
Global energy consumption is rapidly increasing yearly due to drastic industrial advances, requiring the development of new energy storage devices. For this reason, supercapacitors with fast charge-discharge, long life cycle and high power density is getting attention, and have been considered as one of the potential energy storage systems. In this research, we developed a supercapacitor that consists of amorphous manganese oxide($MnO_2$) electrodes deposited onto carbon cloth substrates using the hydrothermal method. The Fe-doped amorphous $MnO_2$ samples were characterized by X-ray diffraction(XRD), Energy Dispersive X-ray spectroscopy(EDX), as well as scanning electron microscopy(SEM). The electrochemical analysis of the prepared samples were performed using cyclic voltammetry and galvanostatic charge-discharge measurements in 1M $Na_2SO_4$ electrolyte. The test results demonstrate that the supercapacitor based on the Fe-doped amorphous $MnO_2$ electrodes has a specific capacitance as high as 163F/g at 1A/g current density, and good cycling stability of 87.34% capacitance retention up to 1000 cycles.
Keywords
Energy storage device; Supercapacitor; Pseudocapacitor; Manganese oxide; Carbon cloth;
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