Korean Chemical Engineering Research

  • 제50권1호
  • /
  • Pages.50-54
  • /
  • 2012
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  • 0304-128X(pISSN)
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  • 2233-9558(eISSN)
한국화학공학회 (The Korean Institute of Chemical Engineers)
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수퍼커패시터 전극을 위한 폴리아닐린/TiO2 복합체의 제조 및 전기화학적 성질

Preparation and Electrochemical Properties of PANI/TiO2 Composites for Supercapacitor Electrodes

  • 박수근 (부산대학교 화공생명공학부) ;
  • 김광만 (한국전자통신연구원 융합부품소재연구부문 전력제어소자팀) ;
  • 이영기 (한국전자통신연구원 융합부품소재연구부문 전력제어소자팀) ;
  • 정용주 (한국기술교육대학교 응용화학공학과) ;
  • 김석 (부산대학교 화공생명공학부)
  • Park, Sukeun (Department of Chemical and Biochemical Engineering, Pusan National University) ;
  • Kim, Kwang Man (Research Team of Power Control Devices, Electronics and Telecommunications Research Institute) ;
  • Lee, Young-Gi (Research Team of Power Control Devices, Electronics and Telecommunications Research Institute) ;
  • Jung, Yongju (Department of Applied Chemical Engineering, Korea University of Technology and Education) ;
  • Kim, Seok (Department of Chemical and Biochemical Engineering, Pusan National University)
  • 투고 : 2011.08.17
  • 심사 : 2011.10.18
  • 발행 : 2012.02.01
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초록

본 연구는 커패시터 전극 응용을 위한 복합체 전극에 관련된 것으로 PANI와 PANI/$TiO_2$로 구성된 수퍼커패시터 전극을 제조하여 cyclic voltammetry(CV)를 이용하여 6 M KOH 수용액에서 축전량(capacitance) 특성을 조사하였다. PANI/$TiO_2$ 복합체는 간단한 in-situ 방법을 통해 다양한 비율로 합성되었다. PANI/$TiO_2$ 복합체의 형태학(morphology)적 특징을 파악하기 위해서 주사전자현미경(SEM)과 투과전자현미경(TEM)을 통해 분석하였고, X선 회절 분석기(XRD)를 이용하여 복합체의 결정화도와 담지된 $TiO_2$의 입자크기를 확인하였다. 전기화학적 시험 결과, 아닐린 대비 $TiO_2$의 주입량이 10 wt%일 때 가장 우수한 축전량(626 $Fg^{-1}$)을 나타냈고 높은 주사속도인 100 $mVs^{-1}$에서 286 $Fg^{-1}$의 비축전량을 나타내었다. 이는 폴리아닐린(PANI) 매트릭스(matrix)에 균일하게 담지된 $TiO_2$(~6.5 nm)가 효과적인 연결 구조를 형성하여 전하이동현상이 증가하고, 축전이 가능한 반응면적이 증가한 것과 관련있다고 판단된다.

In this study, PANI and PANI/$TiO_2$ composites were prepared as electrode materials for a supercapacitor application. Cyclic voltammetry (CV) was performed to investigate the supercapacity properties of these electrodes in an electrolyte solution of 6 M KOH. The PANI/$TiO_2$ composites were polymerized by amount of various ratios through a simple in-situ method. The morphological properties of composites were analyzed by SEM and TEM method. The crystallinity of the composite and $TiO_2$ particle size were identified using X-ray diffraction (XRD). In the electrochemical test, The electrode containing 10 wt% $TiO_2$ content against aniline units showed the highest specific capacitance (626 $Fg^{-1}$) and delivered a capacitance of 286 $Fg^{-1}$ reversibly at a 100 $mVs^{-1}$ rate. According to the surface morphology, the increased capacitance was related to the fact that nano-sized $TiO_2$ particles (~6.5 nm) were uniformly connected for easy charge transfer and an enhanced surface area for capacitance reaction of $TiO_2$ itself.

키워드

과제정보

연구 과제 주관 기관 : 교육과학기술부

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