Korean Chemical Engineering Research

  • 제47권1호
  • /
  • Pages.11-16
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  • 2009
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  • 0304-128X(pISSN)
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  • 2233-9558(eISSN)
한국화학공학회 (The Korean Institute of Chemical Engineers)
권호 표지

단일벽 탄소나노튜브 상에 석출된 산화루테늄과 루테늄-코발트 혼합산화물의 수퍼커패시터 특성

Supercapacitive Properties of RuO2 and Ru-Co Mixed Oxide Deposited on Single-Walled Carbon Nanotube

  • 고장면 (한밭대학교 응용화학생명공학부) ;
  • 김광만 (한국전자통신연구원 융합부품소재 연구부문 차세대에너지기술팀)
  • Ko, Jang Myoun (Department of Applied Chemistry & Biotechnology, Hanbat National University) ;
  • Kim, Kwang Man (Research Team of Next-Generation Energy Technology, Electronics & Telecommunications Research Institute (ETRI))
  • 투고 : 2009.01.21
  • 심사 : 2009.01.31
  • 발행 : 2009.02.28
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초록

단일벽 탄소나노튜브의 표면 위에 동력학적 전위법으로 산화루테늄($RuO_2$)의 석출 및 루테늄-코발트 혼합산화물(Ru-Co mixed oxide)의 공석출에 의해 산화환원 수퍼커페시터용 복합전극을 제조하였다. 루테늄 성분이 13.13 wt%, 코발트 성분이 2.89 wt%가 석출된 Ru-Co 혼합산화물 전극은 낮은 전위 스캔속도($10\;mV\;s^{-1}$)에서는 $RuO_2$ 전극과 유사한 비용량(${\sim}620\;F\;g^{-1}$)을 나타내지만, 높은 스캔속도($500\;mV\;s^{-1}$)에서는 $RuO_2$ 전극보다 큰 비용량을 보인다. 높은 스캔 속도에서 Ru-Co 혼합산화물 전극이 비용량의 증가를 나타내는 것은 Ru 성분을 통한 전기전도성을 Co 성분이 구조적으로 지지해주기 때문이다.

Composite electrodes for redox supercapacitor were prepared potentiodynamically by the deposition of $RuO_2$ and the co-deposition of Ru-Co mixed oxide on the surface of single-walled carbon nanotube. Electrode of Ru-Co mixed oxide, in which Ru(13.13 wt%) and Co(2.89 wt%) were deposited on the carbon nanotube, exhibited a similar specific capacitance(${\sim}620\;F\;g^{-1}$) with $RuO_2$ electrode at a low potential scan rate($10\;mV\;s^{-1}$), but showed a superior one ($570\;F\;g^{-1}$) at a high scan rate($500\;mV\;s^{-1}$) than that of $RuO_2$($475\;F\;g^{-1}$). Such increase in the specific capacitance at high scan rate by the co-deposition of Ru and Co species was due to the structural support of Co species to provide the electronic conduction through Ru species.

키워드

과제정보

연구 과제 주관 기관 : 교육과학기술부

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