Polymer(Korea) (폴리머)

The Polymer Society of Korea (한국고분자학회)
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Preparation and Electrochemical Characteristics of Polymer Electrolyte Based on MCM-41/Poly(ethylene oxide) Composites

MCM-41/Po1y(ethylene oxide) 복합체로 구성된 고분자 전해질의 제조와 전기화학적 특성

  • Kim Seok (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Kang Jin-Young (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Lee Sung-Goo (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Lee Jae-Rook (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Park Soo-Jin (Advanced Materials Division, Korea Research Institute of Chemical Technology)
  • 김석 (한국화학연구원 화학소재연구부) ;
  • 강진영 (한국화학연구원 화학소재연구부) ;
  • 이성구 (한국화학연구원 화학소재연구부) ;
  • 이재락 (한국화학연구원 화학소재연구부) ;
  • 박수진 (한국화학연구원 화학소재연구부)
  • Published : 2005.07.01
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Abstract

In this work, the solid polymer electrolyte (SPE) composites, which are composed of poly(ethylene oxide) (PEO), mesoporous mobil crystalline material-41 (MCM-41), and lithium salt, are prepared in order to investigate the influence of MCM-41 contents on the ionic conductivity of the composites. The crystallinity of the SPE composites was evaluated using differential scanning calorimeter (DSC) and X-ray diffraction (XRD). The ionic conductivity of the SPE composites was measured by the frequency response analyzer (FRA). As a result, the addition of MCM-41 into the polymeric mixture prohibited the growth of PEO crystalline domain due to the mesoporous structures of the MCM-41. The $P(EO)_{16}LiClO_4$/MCM-41 electrolytes show an increased ion conductivity as a function of MCM-41 content up to 8 $wt\%$ and a slightly decreased conductivity over 8 $wt\%$. These ion conductivity characteristics are dependent on a change of polymer crystallinity in the presence of MCM-41 system.

본 연구에서는 mobil crystalline material-41(MCM-41)의 함량 변화에 따른 고체 고분자 전해질(solid polymer electrolyte, SPE)의 이온전도도의 변화를 고찰하기 위하여, poly(ethylene oxide)(PEO), 메조포러스 기공 구조를 가지는 MCM-41 분자체, 그리고 리튬염을 이용하여 SPE를 제조하였다. SPE의 결정화도는 X-선 회절분석(XRD) 및 시차주사열량계(DSC)를 통하여 살펴보았으며, 주파수반응분석(FRA)으로 이온전도도를 측정하여 이온 전도거동을 고찰하였다. 그 결과, MCM-41을 고분자 혼합물에 첨가함에 따라 PEO의 견정성 영역의 성장을 억제할 수 있었으며, 이는 MCM-41이 메조포러스한 구조를 가지고 있기 때문이다. 또한, $P(EO)_{16}LiClO_4$/MCM-41 전해질 복합체의 이온 전도도는 8$wt\%$의 MCM-41을 첨가한 경우 가장 큰 이온전도도를 가지며, 8$wt\%$이상에서는 다소 감소된 이온전도도를 가짐을 관찰할 수 있었다. 이러한 이온전도도의 특성은 MCM-41의 첨가에 따른 고분자의 결정화도 변화와 밀접한 관계를 맺고 있다.

Keywords

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