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Effect of Binders on Electrochemical and Mechanical Properties of Activated Carbon Electrode for Electric Double Layer Capacitor

EDLC용 활성탄소 전극의 전기화학적 기계적 특성에 미치는 바인더의 영향

  • 전민제 (한국전기연구원 전지연구그룹) ;
  • 김익준 (한국전기연구원 전지연구그룹) ;
  • 양선혜 (한국전기연구원 전지연구그룹) ;
  • 문성인 (한국전기연구원 전지연구그룹) ;
  • 김현수 (한국전기연구원 전지연구그룹) ;
  • 오대희 (부경대학교 응용화학공학부 공업화학과)
  • Published : 2006.12.01

Abstract

This work describes the effect of binders, such as carboxymethylcellulose (CMC), CMC+ Polytetrafluoroethylene (PTFE) and PTFE, on the electrochemical and mechanical properties of activated carbon-electrode for electric double layer capacitor. The cell capacitors using the electrode bound with binary binder composed of CMC and PTFE, especially in composition CMC PTFE = 60 : 40 wt.%, has better rate capability and the lower internal resistance than those of the cell capacitor with CMC. On the other hand, the sheet type electrode kneaded with PTFE was bonded with conductive adhesive on Al foil. This cell capacitor using the electrode with PTFE exhibited the best mechanical properties and rate capability compared to the CMC and CMC+PTFE one. These behaviors could be explained by the well-developed network structure of PTFE fibrils doting the kneading process.

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