• Mechanical Properties and Ionic Conductivities of Plasticized Gel Polymer Electrolyte Based on P(VDF-co-HFP)
  • Choi JK, Kim SH
  • 가소화된 P(VdF-co-HFP)계 고분자 전해질의 기계적 성질 및 이온전도도
  • 최종국, 김성훈
Abstract
Gel polymer electrolytes were prepared from poly(vinylidene fluoride-co-hexafluoro propylene)[P(VdF-co-HFP)] that had higher mechanical properties as well as higher dielectric constant(ε=8∼13) than other polymeric metrix. Mechanical properties and ionic conductivities have been investigaed as a function of blend ratio of electrolyte solution and polymer matrix. Ethyl

겔형 고분자 전해질에 적용 가능한 고분자 매트릭스 중 우수한 기계적 성질 및 높은 유전상수(ε=8∼13)를 가지는 poly(vinylidene fluoride-co-hexafluoro propylene)[P(VdF-co-HFP)]을 사용하고, Ethylene carbonate(EC)/γ-butyrolactone(γ-BL)의 혼합용매와 LiCF3SO3를 각각 유기용매와 리튬염으로 사용하여 다양한 농도의 전해액 및 겔형의 고분자 전해질을 제조하였다. 제조된 고분자 전해질의 기계적 성질 및 이온전도를 고분자 매트릭스와 전해액의 혼합비율에 따라 측정하였다. 28.6wt%의 P(VdF-co-HFP)가 함유된 PVH40이 25℃에서 1.09×10-3S/cm의 가장 높은 이온전도도 값을 보였고, 인장강도, 인장탄성율, 압축탄성율 모두 P(VdF-co-HFP)의 함량에 따라 증가했으며 PVH70과 PVH80사이에서 급격한 변화를 나타내었다. 동역학적 특성 측정 시 전형적인 겔의 거동을 보였고, 적용한 변형의 크기에 따라 저장탄성율(G'')과 소신탄성율(G'''')이 변화되었다.

Keywords: gel polymer electrolyte; mechanical property; P(VdF-co-HFP); ionic conductivity

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This Article

  • 2000; 24(2): 259-267

    Published online Mar 25, 2000