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Study on the Cycling Performance of Li4Ti5O12 Electrode in the Ionic Liquid Electrolytes Containing an Additive

  • Kim, Jin-Hee (Department of Chemical Engineering, Hanyang University) ;
  • Song, Seung-Wan (Department of Fine Chemical Engineering & Applied Chemistry, Chungnam National University) ;
  • Hoang, Hung-Van (Department of Fine Chemical Engineering & Applied Chemistry, Chungnam National University) ;
  • Doh, Chil-Hoon (Korea Electrotechnology Research Institute) ;
  • Kim, Dong-Won (Department of Chemical Engineering, Hanyang University)
  • Received : 2010.09.30
  • Accepted : 2010.10.25
  • Published : 2011.01.20

Abstract

The cycling behavior of $Li_4Ti_5O_{12}$ electrode in the ionic liquid (IL)-based electrolytes containing 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl) imide and a small amount of additive (vinylene carbonate, ethylene carbonate, fluoroethylene carbonate) was investigated. The $Li_4Ti_5O_{12}$ electrode in the IL electrolyte with an additive exhibited reversible cycling behavior with good capacity retention. Electrochemical impedance spectroscopy and FTIR studies revealed that an electrochemically stable solid electrolyte interphase was formed on the $Li_4Ti_5O_{12}$ electrode in the presence of vinylene carbonate and ethylene carbonate during cycling.

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