Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Cycling Performance of Li4Ti5O12 Electrodes in Ionic Liquid-Based Gel Polymer Electrolytes

  • Kim, Jin-Hee (Department of Chemical Engineering, Hanyang University) ;
  • Kang, Yong-Ku (Advanced Materials Divisions, Korea Research Institute of Chemical Technology) ;
  • Kim, Dong-Won (Department of Chemical Engineering, Hanyang University)
  • Received : 2011.11.06
  • Accepted : 2011.12.20
  • Published : 2012.02.20
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Abstract

We investigated the cycling behavior of $Li_4Ti_5O_{12}$ electrode in a cross-linked gel polymer electrolyte based on non-flammable ionic liquid consisting of 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl) imide and vinylene carbonate. The $Li_4Ti_5O_{12}$ electrodes in ionic liquid-based gel polymer electrolytes exhibited reversible cycling behavior with good capacity retention. Cycling data and electrochemical impedance spectroscopy analyses revealed that the optimum content of the cross-linking agent necessary to ensure both acceptable initial discharge capacity and good capacity retention was about 8 wt %.

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