Aluminum Solid Electrolytic Capacitor Employing Polypyrrole as Solid Electrolyte

폴리피롤을 고체전해질로 이용한 알루미늄 고체전해 캐패시터

  • Cho, Jun-Sang (Sam Young Electronics Co. Ltd., Sam Song Research Institute) ;
  • Yoo, Nam-San (Sam Young Electronics Co. Ltd., Sam Song Research Institute) ;
  • Lee, Sang-Bin (Sam Young Electronics Co. Ltd., Sam Song Research Institute) ;
  • Park, Young-Seo (Korea Institute of Industry and Technology Information)
  • 조준상 (삼영전자공업(주) 삼송연구소) ;
  • 유남산 (삼영전자공업(주) 삼송연구소) ;
  • 이상빈 (삼영전자공업(주) 삼송연구소) ;
  • 박영서 (산업기술정보원)
  • Received : 1997.05.28
  • Accepted : 1997.07.31
  • Published : 1997.10.10

Abstract

Aluminium solid electrolytic capacitor in which electroconducting polypyrrole(PPy) is used as an electrolyte is studied. Pyrrole(Py) is electrochemically synthesized using the etched and anodized aluminium foil electrode($Al_2O_3$) as an anode on which the thin layer of chemicalpolymerized PPy as a pre-coating layer is formed previously by chemical oxidative polymerization(CP). Investigating the effects of the polymerization conditions on the electrical characteristics of resulting capacitors, the capacitors which were obtained from the galvanostatic electrolysis of pyrrole containing sodium p-toluenesulfonate(TsONa) under the currents of $2.0{\sim}4.0mA/unit(6.5{\times}10mm)$, showed the most superior properties.

전도성 고분자인 폴리피롤(PPy)을 전해질로 하는 알루미늄(Al)고체전해 캐패시터를 제작하기 위하여 알루미늄 산화피막($Al_2O_3$) 위에 화학산화중합(CP)법으로 얇은 PPy층을 형성시키고, 이 층을 양극으로 이용하여 피롤(Py)을 전해산화중합(EP)시켰다. 캐패시터 특성에 영향을 미치는 중합조건을 조사한 결과, 지지전해질로서 sodium p-toluenesulfonate (TsONa)를 사용하고, 소자당 2.0~4.0 mA의 정전류를 인가, 전해중합 후 제작한 캐패시터의 전기적 특성 및 임피던스 특성이 가장 우수하였다.

Keywords

References

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