• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.1225-1226
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• 2015

본 연구에서는, carbon microfiber (CMF) 소재를 이용하여 전극을 제작하고 이를 바탕으로 플렉시블 비대칭 슈퍼커패시터를 설계 및 제작하여 특성을 측정 및 분석하였다. 제작된 CMF 전극은 넓은 비표면적과 물리적 안정성 및 화학적 안정성, 높은 유연성을 가지며 무게가 가벼운 특징을 가진다. 개발된 슈퍼커패시터의 양극과 음극은 각각 CMF/Cu/NiO과 단일 CMF로 구성되어져 있으며, KOH 전해질 수용액에서 우수한 슈도 커패시터의 우수한 동작 특성을 나타내었으며, 슈퍼커패시터의 특성 커패시턴스와 평균 에너지 밀도는 각각 22.1 F/g와 8.9 Wh/kg을 나타내었다.

• The Transactions of the Korean Institute of Power Electronics
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• v.16 no.6
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• pp.577-586
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• 2011

This paper describes the development of hardware simulator for the operation analysis of DC microgrid. The hardware simulator consists of several distributed power sources such as a wind power generation, solar power and fuel cell, and two energy storages such as a supercapacitor and battery. The main controller which performs a role of energy management and state monitoring is connected with the local controller in each power source and storage through ethernet-based communication link. The developed hardware simulator can be utilized to analyze the performance DC microgrid with practical manner.

• Journal of the Korean Electrochemical Society
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• v.16 no.3
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• pp.129-137
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• 2013

From the cooked-rice as a raw material, activated carbons throughout a hydrothermal synthesis and vacuum soak of KOH for chemical activation were obtained. Activated carbon electrodes for electric double layer supercapacitors were prepared and electrochemical characteristics were examined. Including the specific surface area by BET method and pore size distribution by NLDFT method, physical properties of activated carbons were investigated by means of SEM, EDS, XRD, and TG analyses. Cycle voltammetry and AC-impedance measurements were conducted to confirm the electrochemical characteristics for the electrodes. From hydrothermal synthesis, $5{\sim}7{\mu}m$ diameters of spherical carbons were obtained. After the activation at $800^{\circ}C$, it was notable for the activated carbon to be the specific surface $1631.8cm^2/g$, pore size distribution in 0.9~2.1 nm, and micro-pore volume $0.6154cm^3/g$. As electrochemical characteristics of the activated carbon electrode in 6M KOH electrolyte, it was confirmed that the specific capacitances of 236, 194, and 137 F/g at the scan rate of 5, 100, and 500 mV/s respectively were exhibited and 91.2% of initial capacitance after 100,000 cycles at 200 mV/s was maintained.