화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.22, No.8, 875-881, August, 2014
DOI10.1007/s13233-014-2123-9  Export Citation
Synthesis and Electrochemical Properties of Gel Polymer Electrolyte Using Poly(2-(dimethylamino)ethyl methacrylate-co-methyl methacrylate) for Fabricating Lithium Ion Polymer Battery
Sohee Kim1, 2, Jungdon Suk1, 3, Sungkwon Hong2, Mijeong Han1, 3, †, and Yongku Kang1, 3, †
  • 1Advanced Materials Division, Korea Research Institute of Chemical Technology, Daejeon, 305-600, Korea
  • 2Department of Polymer Science and Engineering, Chungnam National University, Daejeon, 305-764, Korea
  • 3, Korea
E-mail:,
Random copolymers comprising 2-(dimethylamino)ethyl methacrylate (DMAEMA) and methyl methacrylate (MMA) are synthesized by radical polymerization using 2,2′-azobis(2-methylpropionitrile) (AIBN) as an initiator. Gel polymer electrolytes (GPEs) are prepared by in situ thermal curing using different ratios of siloxane-epoxide cross-linker to poly(DMAEMA-co-MMA) and various contents and types of liquid electrolytes. GPEs offer several advantages such as in situ thermal cross-linking without requiring an additional radical initiator, relatively shorter curing time (~3 h) and lower curing temperature. When the ratio of the siloxane-epoxide cross-linker to poly(DMAEMA-co-MMA) is 1:5, the GPE with 98 wt% liquid electrolyte exhibits the highest ionic conductivity of 8.87×10-3 S/cm at 30 ℃. The electrochemical stability window of the GPE is measured to be 5.1 V vs. Li/Li+. A unit cell comprising LiCoO2/GPE/graphite exhibits an initial discharge capacity of 145.6 mAh/g at 0.1 C, and the unit cell has good rate capability and cycling performance.
Keywords:poly(2-(dimethylamino)ethyl methacrylate-co-methyl methacrylate);gel polymer electrolyte;ionic conductivity;lithium-ion polymer battery.
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