On the Performances of Ionic Liquid-Based Electrolytes for Li-NMC Batteries

Victor Chaudoy, Fouad Ghamouss*, Johan Jacquemin, Jean-Christophe Houdbert, François Tran-Van

*Corresponding author for this work

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Herein, the N-butyl-N-methylpyrrolidinium bis(fluorosulfonyl)amide and the N-propyl-N-methylpyrrolidinium bis(fluorosulfonyl)amide room temperature ionic liquids, combined with the lithium bis(trifluoromethanesulfonyl)amide salt, are investigated as electrolytes for Li/LiNi1/3Mn1/3Co1/3O2 (Li/NMC) batteries. To conduct this study, volumetric properties, ionic conductivity and viscosity of the pure ionic liquids and selected electrolytes were firstly determined as a function of temperature and composition in solution. These data were then compared with those measured in the case of the standard alkyl carbonate-based electrolyte: e.g. the EC/PC/3DMC + 1 mol·L−1 LiPF6. The compatibility of the selected electrolytes with the lithium electrode was then investigated by following the evolution of Li/electrolyte interfaces through impedance measurements. Interestingly, the impedances of the investigated Li/electrolyte interfaces were found to be more than three times lower than that measured using the standard electrolyte. Finally, electrochemical performances of the ionic liquid-based electrolytes were investigated using galvanostatic charge and discharge and cyclic voltammetry of each Li/NMC cell. Using these electrolytes, each tested Li cell reaches up to 145 mA·h·g−1 at C/10 and 110 mA·h·g−1 at C with a coulombic efficiency close to 100 %.
Original languageEnglish
Pages (from-to)769-789
Number of pages21
JournalJournal of Solution Chemistry
Volume44
Issue number3
Early online date12 Mar 2015
DOIs
Publication statusPublished - Apr 2015

Keywords

  • Electrochemical performance
  • Ionic liquids
  • Lithium salt
  • NMC batteries
  • Transport properties

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Biochemistry
  • Biophysics
  • Molecular Biology

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  • Cite this

    Chaudoy, V., Ghamouss, F., Jacquemin, J., Houdbert, J-C., & Tran-Van, F. (2015). On the Performances of Ionic Liquid-Based Electrolytes for Li-NMC Batteries. Journal of Solution Chemistry, 44(3), 769-789. https://doi.org/10.1007/s10953-015-0315-3