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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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Commercial activated-carbon used as the electrode material of an electric double-layer capacitor (EDLC) was posttreated with various acids and alkalis to increase its capacitance. The carbon samples prepared were then heat-treated in order to control the amount of acidic functional groups formed by the acid treatments. Coin-type EDLC cells with two symmetric carbon electrodes were assembled using the prepared carbon materials and an organic electrolyte. The electrochemical performance of the EDLC was measured by galvanostatic charge-discharge, cyclic voltammetry, and electrochemical impedance spectroscopy. Among the various activated carbons, the carbon electrodes (CSsb800) prepared by the treatments of coconutshell-based carbon activated with NaOH and $H_3BO_5$, and then heat treated at $800^{\circ}C$ under a flow of nitrogen gas, showed relatively good electrochemical performance. Although the specific-surface-area of the carbon-electrode material ($1,096m^2/g$) was less than that of pristine activated-carbon ($1,122m^2/g$), the meso-pore volume increased after the combined chemical and heat treatments. The specific capacitance of the EDLC increased from 59.6 to 74.8 F/g (26%) after those post treatments. The equivalent series resistance of EDLC using CSsb800 as electrode was much lower than that of EDLC using pristine activated carbon. Therefore, CSsb800 exhibited superior electrochemical performance at high scan rates due to its low internal resistance.
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참고문헌 (20)
참고문헌 신청
A. G. Pandolfo / 2006 / J. Power Sources 157(1):11
S. G. Park / 2012 / J. Inst. Const. Technol 31:57
김현철 / 2011 / Propylene Carbonate 첨가된 1-ethy1-3-methylimidazolium의 전기이중층 커패시터에서의 효과 / 전기화학회지 14(1):38~43
김상길 / 2011 / Supercapacitor용 이온성 액체 전해질의 전기화학적 특성 / 전기화학회지 14(4):201~207
A. Elmouwahidi / 2012 / Bioresour. Technol 111:185
S. G. Park / 2012 / J. Inst. Const. Technol 31:57
김현철 / 2011 / Propylene Carbonate 첨가된 1-ethy1-3-methylimidazolium의 전기이중층 커패시터에서의 효과 / 전기화학회지 14(1):38~43
김상길 / 2011 / Supercapacitor용 이온성 액체 전해질의 전기화학적 특성 / 전기화학회지 14(4):201~207
A. Elmouwahidi / 2012 / Bioresour. Technol 111:185
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