Polymer(Korea) (폴리머)

The Polymer Society of Korea (한국고분자학회)
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Preparation and Electrochemical Properties of Polymeric Composite Electrolytes Containing Organic Clay Materials

Organic Clay가 첨가된 고분자 복합 전해질의 제조 및 전기화학적 성질

  • Kim, Seok (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Hwang, Eun-Ju (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Lee, Jea-Rock (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Kim, Hyung-Il (Department of Industrial Chemistry, Chungnam National University) ;
  • Park, Soo-Jin (Department of Chemistry, Inha University)
  • 김석 (한국화학연구원 화학소재연구부) ;
  • 황은주 (한국화학연구원 화학소재연구부) ;
  • 이재락 (한국화학연구원 화학소재연구부) ;
  • 김형일 (충남대학교 정밀공업화학과) ;
  • 박수진 (인하대학교 화학과)
  • Published : 2007.07.31
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Abstract

In this work, polymer/(layered silicate) nanocomposites (PLSN) based on poly (ethylene oxide) (PEO), ethylene carbonate (EC) as a plasticizer, lithium salt ($LiClO_4$), and sodium montmorillonite ($Na^+-MMT$) or organic montmorillonite (organic MMT) clay were fabricated. And the effects of organic MMT on the polymer matrix were investigated as a function of ionic conductivity. For the application to electrolytes an Li batteries, polymer electrolytes containing the organic nanoclays were used in this work. As a result, the spacing between layers and hydrophobicity of the organic nanoclays were increased, affecting on the exfoliation behaviors of the MMT layers in clay/PEO nanocomposites. From ion-conductivity results, the organic-MMT showed higher values than those of $Na^+-MMT$, and the MMT-20A sample that was treated by methyl dihydrogenated tallow ammonium, showed the highest conductivity in this system.

본 연구에서는 poly(ethylene oxide) (PEO), 가소제인 ethylene carbonate(EC), 리튬염인 $LiClO_4$ 그리고 $Na^+-MMT/organic$ MMT를 이용하여 고분자/층상 실리카 나노복합재료(polymer/(layered silicate) nanocomposites, PLSN)를 제조하였으며, organic MMT의 첨가에 따른 고분자 매트릭스에 미치는 영향을 이온전도도를 통하여 관찰하였다. 리튬전지의 전해질로서의 응용을 위해, $Na^+$를 양이온으로 갖는 순수한 MMT($Na^+-MMT$)를 유기화한 nanoclay(organic-MMT)를 사용하였다. 그 결과, 층간 거리 및 소수성이 증가하며 이와 같은 특성은 PEO와의 나노복합체를 형성할 때 MMT의 박리 거동에 영향을 미치는 것을 확인할 수 있었다. 또한, 이온전도도에서는 organic MMT가 순수한 $Na^+-MMT$보다 우수함을 나타내었으며, methyl dihydrogenated tallow ammonium으로 개질된 MMT(MMT-2OA)를 첨가하였을 때 가장 높은 이온전도도를 보였다.

Keywords

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