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Search / Korean Journal of Chemical Engineering
Korean Chemical Engineering Research,
Vol.42, No.6, 741-747, 2004
폴리에틸렌옥사이드계 고체 고분자전해질의 특성에 미치는 과불화폴리에테르 첨가 효과
Perfluoropolyether Addition Effect on the Properties of Poly(Ethylene Oxide)-Based Solid Polymer Electrolytes
권정옥, 유종성, 노시태
과불화폴리에테르 (perfluoropolyether, PFPE)의 첨가가 폴리에틸렌옥사이드 (polyethyleneoxide, PEO)계 고체 고분 자전해질 (solid polymer electrolyte, SPE)의 특성에 미치는 영향을 연구하였다. PFPE/PEO PU에서 PFPE와 PEO의 질량비는 각각 1/99, 5/95, 10-90 그리고 20/80로 조절하였으며 lithium trifluoromethane sulfonate (LiCF3SO3를 사용하여 PFPE/PEO PU/LiCF3SO3를 제조하였다. 시차주사열량분석 (differential scanning calorimetric analysis, DSC) 결과는 PFPE/PEO PU내 PEO상의 유리전이온도 (Tg)와 용융온도 (Tm)가 PFPE/PEO의 질량비에 관계없이 일정하였으며, PFPE/PEO PU/LiCF3SO3에서는 PEO상의 용융은 관찰되지 않았으며, 같은 리튬염 농도를 갖는 PFPE/PEO PU/LiCF3SO3의 Tg는 PFPE 함량 증가에 따라 약간 증가하였다. 접촉각 측정으로부터 계산된 표면에너지는 PFPE/PEO PU와 PFPE/PEO PU/LiCF3SO3가 유사하였으며 PFPE 함량의 증가에 따라 감소되었다. 열중량 분석 결과는 PFPE의 함량 증가에 따라 열안정성이 감소하였다. PFPE/PEO PU/LiCF3SO3의 이온전도도는 PFPE 함량의 증가에 따라 약간 증가하였다.
We studied perfluoropolyether addition effect on the properties of poly(ethylene oxide)-based solid polymer electrolytes (SPE). PFPE/PEO PU prepared with 1/99, 5/95, 10/90, and 20/80 of PFPE/PEO wt. ratio. PFPE/PEO PU/LiCF3SO3 was prepared from lithium trifluoromethane sulfonate (LiCF3SO3). The glass transition temperatures (Tg) and melting temperatures (Tm) of PEO phases from differential scanning calorimetric analysis (DSC) were similar in salt-free PFPE/PEO PU series regardless of PFPE/PEO wt. ratio. In a series of PFPE/PEO PU/LiCF3SO3, Tg of PEO phase slightly increased with increasing PFPE contents. In both series of PFPE/PEO PU and PFPE/PEO PU/LiCF3SO3, the surface energies calculated by contact angle decreased with the increase of PFPE contents due to PFPE phase localized on the surface. Thermal stability from thermogravimetric analysis (TGA) was slightly decreased with increasing PFPE contents in both PFPE/PEO PU and PFPE/PEO PU/LiCF3SO3. Ionic conductivity of PFPE/PEO PU/LiCF3SO3 was slightly increased with the increase of PFPE contents.
Keywords: Perfluoropolyether; Solid Polymer Electrolytes; Lithium Polymer Battery; Thermal Property; Ionic Conductivity
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[Cited By]
  1. Seo YJ, Cha JH, Lee H, Ha YJ, Koh JH, Lee C, Korean Chemical Engineering Research, 46(1), 170, 2008
  2. Han AR, Park SJ, Shin JS, Kim S, Korean Chemical Engineering Research, 47(4), 476, 2009
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