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Received February 26, 2008
Accepted April 13, 2008
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탄소나노섬유 및 RuO2가 폴리아닐린의 초고용량 캐폐시턴스 특성에 미치는 효과
Electrochemical Properties of Polyaniline with Carbon Nanotube and RuO2 as Supercapacitor Electrodes
한밭대학교 응용화학생명공학부, 305-719 대전광역시 유성구 덕명동 산 16-1
Division of Applied Chemistry and Biotechnology, Hanbat National University, 16-1 San Dukmyung-dong, Yusong, Daejeon 305-719, Korea
jmko@hanbat.ac.kr
Korean Chemical Engineering Research, October 2008, 46(5), 898-902(5), NONE Epub 10 November 2008
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Abstract
Polyaniline(PAN), multi-walled carbon nanotube(CNT)/PAN, CNT/PAN/RuO2로 구성된 초고용량캐폐시터 전극을 제조하여 cyclic voltammetry(CV)를 이용하여 1 M H2SO4 수용액에서 캐패시턴스 특성을 조사하였다. PAN, CNT/PAN 그리고 CNT/PAN/RuO2 복합전극은 높은 주사속도인 1,000 mV/s에서 199, 304, 392 F/g의 비용량을 각각 나타내었다. 수명시험 결과, CNT/PAN/RuO2, CNT/PAN, PAN 전극은 10,000 번의 싸이클에서 각각 61, 66 그리고 51%의 초기용량을 유지하였다. PAN 전극은 CNT와 복합화하여 축전용량 및 수명특성을 향상시킬 수 있으며, RuO2 도입은 축전용량 향상에는 기여하나 수명 증가 효과는 미미하였다.
Prepared are three types of composite supercapacitor electrode, such as electroactive polyaniline(PAN), PAN/multi-walled carbon nanotube(CNT), and PAN/CNT/RuO2. Cyclic voltammetry was performed to investigate the supercapacitive properties of these electrodes in an electrolyte solution of 1.0M H2SO4. The PAN/CNT/RuO2 electrode showed the highest specific capacitance at all scan rates(e.g., 441 and 392 F g-1 at 100 and 1,000 mV s-1, respectively). In cycle performance, however, the PAN/CNT electrode demonstrated the best capacitance retention (66%) at 104th cycle.
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