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Synthesis and electrochemical properties of gel polymer electrolyte using poly(2-(dimethylamino)ethyl methacrylate-co-methyl methacrylate) for fabricating lithium ion polymer battery
- 作者:Sohee Kim ; Jungdon Suk ; Sungkwon Hong ; Mijeong Han ; Yongku Kang
- 关键词:poly(2 ; (dimethylamino)ethyl methacrylate ; co ; methyl methacrylate) ; gel polymer electrolyte ; ionic conductivity ; lithium ; ion polymer battery
- 刊名:Macromolecular Research
- 出版年:2014
- 出版时间:August 2014
- 年:2014
- 卷:22
- 期:8
- 页码:875-881
- 全文大小:534 KB
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- 作者单位:Sohee Kim (1) (2)
Jungdon Suk (1) Sungkwon Hong (2) Mijeong Han (1) Yongku Kang (1)
1. Advanced Materials Division, Korea Research Institute of Chemical Technology, Daejeon, 305-600, Korea 2. Department of Polymer Science and Engineering, Chungnam National University, Daejeon, 305-764, Korea
- ISSN:2092-7673
文摘
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? S/cm at 30 °C. 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.
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