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Carbon Cloth을 이용한 이산화망간 슈퍼커패시터 특성 연구
이승진(Seung Jin Lee),김치훈(Chihoon Kim),지택수(Taeksoo Ji) 한국디지털콘텐츠학회 2017 한국디지털콘텐츠학회논문지 Vol.18 No.6
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(MnO₂) electrodes deposited onto carbon cloth substrates using the hydrothermal method. The Fe-doped amorphous MnO₂ 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 Na₂SO₄ electrolyte. The test results demonstrate that the supercapacitor based on the Fe-doped amorphous MnO₂ 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.