Journal of the Korean Electrochemical Society (전기화학회지)

The Korean Electrochemical Society (한국전기화학회)
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Properties of N-butyl-N-methyl-pyrrolidinium Bis(trifluoromethanesulfonyl) Imide Based Electrolytes as a Function of Lithium Bis(trifluoromethanesulfonyl) Imide Doping

  • Kim, Jae-Kwang (Department of Applied Physics, Chalmers University of Technology) ;
  • Lim, Du-Hyun (Department of Chemical & Biological Engineering, Gyeongsang National University) ;
  • Scheers, Johan (Department of Applied Physics, Chalmers University of Technology) ;
  • Pitawala, Jagath (Department of Applied Physics, Chalmers University of Technology) ;
  • Wilken, Susanne (Department of Applied Physics, Chalmers University of Technology) ;
  • Johansson, Patrik (Department of Applied Physics, Chalmers University of Technology) ;
  • Ahn, Jou-Hyeon (Department of Chemical & Biological Engineering, Gyeongsang National University) ;
  • Matic, Aleksandar (Department of Applied Physics, Chalmers University of Technology) ;
  • Jacobsson, Per (Department of Applied Physics, Chalmers University of Technology)
  • Received : 2011.03.14
  • Accepted : 2011.05.30
  • Published : 2011.05.31
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Abstract

In this study we have investigated the Li-ion coordination, thermal behavior and electrochemical stability of N-butyl-N-methyl-pyrrolidinium bis(trifluoromethanesulfonyl)imide ($Py_{14}TFSI$) with lithium bis(trifluoromethanesulfony)imide (LiTFSI) doping intended for use as electrolytes for lithium batteries. The ionic conductivity is reduced and glass transition temperature ($T_g$) increases with LiTFSI doping concentration. Also, the electrochemical stability increases with LiTFSI doping. A high LiTFSI doping could enhance the electrochemical stability of electrolytes for lithium batteries, whereas the decrease in the ionic conductivity limits the capacity of the battery.

Keywords

References

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