Solubility, ionic conductivity and viscosity of lithium salts in room temperature ionic liquids

Zachary P. Rosol, Natalie J. German, Stephen Gross

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Lithium salts used in batteries have poor solubility in many common room temperature ionic liquids, such as 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMITFSI). Lithium salt solutions in ionic liquids that contain the thiocyanate anion, in contrast, can be prepared at concentrations as high as 4 M. The solubility of three common lithium salts (LiClO4, LiSCN and LiTFSI) used in lithium batteries were measured for four room temperature ionic liquids including 1-butyl-3-methylimidazolium hexafluorophosphate (bmimPF6), 1-butyl-3-methylimidazolium acetate (bmimACET), 1-butyl-3-methylimidazolium thiocyanate (bmimSCN) and EMITFSI. The solubility was determined using Fourier Transform Infrared Attenuated Total Reflectance spectroscopy (FTIR-ATR), which was an efficient method for determining electrolyte solubility in electrolyte solvents. The ionic conductivity of room temperature ionic liquids with thiocyanate containing anions with high concentrations of lithium salts was determined using AC impedance. There was an optimal lithium salt concentration in the ionic liquid in terms of maximum ionic conductivity for the solutions.

Original languageEnglish
Pages (from-to)1453-1457
Number of pages5
JournalGreen Chemistry
Volume11
Issue number9
DOIs
StatePublished - 2009

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Ionic Liquids
Ionic conductivity
lithium
Lithium
Ionic liquids
solubility
conductivity
viscosity
Solubility
Salts
Viscosity
salt
temperature
Electrolytes
Anions
Negative ions
Temperature
electrolyte
anion
Imides

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Pollution

Cite this

Solubility, ionic conductivity and viscosity of lithium salts in room temperature ionic liquids. / Rosol, Zachary P.; German, Natalie J.; Gross, Stephen.

In: Green Chemistry, Vol. 11, No. 9, 2009, p. 1453-1457.

Research output: Contribution to journalArticle

Rosol, Zachary P. ; German, Natalie J. ; Gross, Stephen. / Solubility, ionic conductivity and viscosity of lithium salts in room temperature ionic liquids. In: Green Chemistry. 2009 ; Vol. 11, No. 9. pp. 1453-1457.
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