화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.64, 453-460, August, 2018
DOI10.1016/j.jiec.2018.04.006  Export Citation
Nonflammable and thermally stable gel polymer electrolytes based on crosslinked perfluoropolyether (PFPE) network for lithium battery applications
Ji-Hoon Baik1, Dong-Gyun Kim2, 3, Jin Hong Lee1, Sangwan Kim1, Dong Gi Hong1, and Jong-Chan Lee1, †
  • 1School of Chemical and Biological Engineering and Institute of Chemical Processes, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
  • 2Advanced Materials Division, Korea Research Institute of Chemical Technology, 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, Republic of Korea
  • 3Chemical Convergence Materials and Processes, University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34114, Republic of Korea
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A gel polymer electrolyte (FGPE) based on a perfluoropolyether (PFPE) crosslinker and liquid state PFPE doped with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) is prepared, and its characteristics including ionic conductivities, Li+ transference numbers, and thermal/electrochemical stabilities are investigated. A commercial PFPE-dimethacrylate, Fluorolink MD7001, is found to be a suitable crosslinker for the FGPE preparation due to its good miscibility with the PFPE/LiTFSI electrolytes. The ionic conductivity and Li+ transference number of the FGPE at 60 °C are 1.72 X 10-5 S cm-1, and 0.53, respectively. The FGPE is nonflammable, thermally stable up to 175 °C without any weight loss, and has a wide electrochemical stability window (~5.0 V vs. Li/Li+). Therefore, the FGPE is expected to be a promising electrolyte candidate for safety-reinforced high-temperature lithium batteries.
Keywords:Perfluoropolyether;Nonflammable electrolytes;Gel polymer electrolytes;Lithium batteries
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