Journal of Applied Electrochemistry

, Volume 40, Issue 9, pp 1619–1624 | Cite as

LiFePO4 cathode in N-methyl-N-propylpiperidinium and N-methyl-N-propylpyrrolidinium bis(trifluoromethanesulfonyl)imide

  • Andrzej Lewandowski
  • Ilona Acznik
  • Agnieszka Swiderska-Mocek
Original Paper


Ternary [Li+][MePrPip+][NTf 2 ] and [Li+][MePrPyrr+][NTf 2 ] room temperature ionic liquids (ILs) were obtained by dissolution of solid lithium bis(trifluoromethanesulfonyl)imide (LiNTf2) in liquid N-methyl-N-propylpiperidinium bis(trifluoromethanesulfonyl)imide and N-methyl-N-propylpyrrolidinium bis(trifluoromethanesulfonyl)imide, respectively, and studied as electrolytes for the use in Li/LiFePO4 or C(Li)/LiFePO4 batteries. The cell worked properly in the presence of 10 wt% of vinylene carbonate (VC). Impedance-spectroscopy studies showed that the additive (VC) forms a protective coating on the anode. The LiFePO4 cathode shows good efficiency (135 mAh g−1) working together with [Li+][MePrPip+][NTf 2 ] + VC and [Li+][MePrPyrr+][NTf 2 ] + VC ionic liquid electrolytes. The flash point of ionic liquid electrolytes containing 10 wt% of VC is above 300 °C, which makes them practically non-flammable.


Ionic liquid Lithium LiFePO4 Lithium-ion battery Cathode SEI 



Support of grant DS31-178/09 is gratefully acknowledged.


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Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • Andrzej Lewandowski
    • 1
  • Ilona Acznik
    • 1
  • Agnieszka Swiderska-Mocek
    • 1
  1. 1.Faculty of Chemical TechnologyPoznań University of TechnologyPoznańPoland

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