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Preparation and Electrochemical Performance of Carbon-PTFE Electrode for Electric Double Layer Capacitor

EDLC용 Carbon-PTFE 전극의 제조 및 전기화학적 특성

  • 김익준 (한국전기연구원 전지연구그룹) ;
  • 이선영 (한국전기연구원 전지연구그룹) ;
  • 문성인 (한국전기연구원 전지연구그룹)
  • Published : 2005.09.01

Abstract

This work describes the effect of the number of roll pressing and the composition of carbon black on the electric and mechanical properties of carbon-PTFE electrode, in which composition is MSP20 : carbon black : $PTFE\;=\;95-X\;:\;X\;:\;5wt.\%$. It was found that the best electric and mechanical properties were obtained for sheet electrode roll pressed about 15 times and for sheet electrode, in which composition is MSP20 : carton black $PTFE\;=\;80\;:\;15\;:\;5wt.\%$. These behaviors could be explained by the network structure of PTFE fibrils and conducting Paths linked with carbon blacks, respectively. On the other hand, cell capacitor using the sheet electrode with $15wt.\%$ of carbon black attached on aluminum current collector with the electric conductive adhesive, in composition is carbon black $CMC\;=\;70\;:\;30wt.\%$, has exhibited the best rate capability between $0.5\;mA/cm^2\~100\;mA/cm^2$ current density and the lowest ESR.

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