Physical properties of selected ionic liquids for use as electrolytes and other industrial applications

S. Isobel Fletcher, Fiona B. Sillars, Nicholas E. Hudson, Peter J. Hall

Research output: Contribution to journalArticle

65 Citations (Scopus)

Abstract

The physical properties of selected room temperature ionic liquids (RTILs) were measured using differential scanning calorimetry, du Nouy tensiometry, and rheometry primarily to determine their suitability for use in electrochemical double layer capacitors. RTILs have other uses, however, such as liquid-liquid extraction, catalysis, and heat transfer, and these measurements may also be of use to researchers working in other fields. The ionic liquids used were 1-ethyl-3-methylimidazolium dicyanamide [emim][N(CN)(2)], 1,2-dimethyl-3-propylimidazolium bis(trifluoromethylsulfonyl)imide [dmpim] [Tf2N], and 1-butyl-1-methylpyrrolidinium tris(pentafluoroethyl)trifluorophosphate [bmpyr][Pf(3)PF(3)]. Glass transition temperatures, crystallization and melting temperatures, surface tensions, and viscosities are reported. The three ionic liquids displayed a range of crystallization behaviors when cooled to 123.15 K and reheated to 403.15 K. All liquids were Newtonian over a range of shear rates from (10 to 1000) s(-1). Viscosities decreased with temperature, and this has been modeled using the Williams-Landel-Ferry equation.

LanguageEnglish
Pages778-782
Number of pages5
JournalJournal of Chemical and Engineering Data
Volume55
Issue number2
DOIs
Publication statusPublished - Feb 2010

Fingerprint

Ionic Liquids
Ionic liquids
Electrolytes
Industrial applications
Physical properties
Crystallization
Platelet Factor 3
Viscosity
Imides
Newtonian liquids
Liquids
Temperature
Shear deformation
Catalysis
Surface tension
Melting point
Differential scanning calorimetry
Capacitors
Heat transfer

Keywords

  • surface-tension measurements
  • physiocochemical properties
  • electrochemical properties
  • thermophysical properties
  • temperature
  • imidazolium
  • conductivity
  • ammonium
  • viscosity

Cite this

@article{f947ae2cca3f48e5af309f6b6fba7f9d,
title = "Physical properties of selected ionic liquids for use as electrolytes and other industrial applications",
abstract = "The physical properties of selected room temperature ionic liquids (RTILs) were measured using differential scanning calorimetry, du Nouy tensiometry, and rheometry primarily to determine their suitability for use in electrochemical double layer capacitors. RTILs have other uses, however, such as liquid-liquid extraction, catalysis, and heat transfer, and these measurements may also be of use to researchers working in other fields. The ionic liquids used were 1-ethyl-3-methylimidazolium dicyanamide [emim][N(CN)(2)], 1,2-dimethyl-3-propylimidazolium bis(trifluoromethylsulfonyl)imide [dmpim] [Tf2N], and 1-butyl-1-methylpyrrolidinium tris(pentafluoroethyl)trifluorophosphate [bmpyr][Pf(3)PF(3)]. Glass transition temperatures, crystallization and melting temperatures, surface tensions, and viscosities are reported. The three ionic liquids displayed a range of crystallization behaviors when cooled to 123.15 K and reheated to 403.15 K. All liquids were Newtonian over a range of shear rates from (10 to 1000) s(-1). Viscosities decreased with temperature, and this has been modeled using the Williams-Landel-Ferry equation.",
keywords = "surface-tension measurements, physiocochemical properties, electrochemical properties, thermophysical properties, temperature, imidazolium, conductivity, ammonium, viscosity",
author = "Fletcher, {S. Isobel} and Sillars, {Fiona B.} and Hudson, {Nicholas E.} and Hall, {Peter J.}",
year = "2010",
month = "2",
doi = "10.1021/je900405j",
language = "English",
volume = "55",
pages = "778--782",
journal = "Journal of Chemical and Engineering Data",
issn = "0021-9568",
publisher = "American Chemical Society",
number = "2",

}

Physical properties of selected ionic liquids for use as electrolytes and other industrial applications. / Fletcher, S. Isobel; Sillars, Fiona B.; Hudson, Nicholas E.; Hall, Peter J.

In: Journal of Chemical and Engineering Data, Vol. 55, No. 2, 02.2010, p. 778-782.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Physical properties of selected ionic liquids for use as electrolytes and other industrial applications

AU - Fletcher, S. Isobel

AU - Sillars, Fiona B.

AU - Hudson, Nicholas E.

AU - Hall, Peter J.

PY - 2010/2

Y1 - 2010/2

N2 - The physical properties of selected room temperature ionic liquids (RTILs) were measured using differential scanning calorimetry, du Nouy tensiometry, and rheometry primarily to determine their suitability for use in electrochemical double layer capacitors. RTILs have other uses, however, such as liquid-liquid extraction, catalysis, and heat transfer, and these measurements may also be of use to researchers working in other fields. The ionic liquids used were 1-ethyl-3-methylimidazolium dicyanamide [emim][N(CN)(2)], 1,2-dimethyl-3-propylimidazolium bis(trifluoromethylsulfonyl)imide [dmpim] [Tf2N], and 1-butyl-1-methylpyrrolidinium tris(pentafluoroethyl)trifluorophosphate [bmpyr][Pf(3)PF(3)]. Glass transition temperatures, crystallization and melting temperatures, surface tensions, and viscosities are reported. The three ionic liquids displayed a range of crystallization behaviors when cooled to 123.15 K and reheated to 403.15 K. All liquids were Newtonian over a range of shear rates from (10 to 1000) s(-1). Viscosities decreased with temperature, and this has been modeled using the Williams-Landel-Ferry equation.

AB - The physical properties of selected room temperature ionic liquids (RTILs) were measured using differential scanning calorimetry, du Nouy tensiometry, and rheometry primarily to determine their suitability for use in electrochemical double layer capacitors. RTILs have other uses, however, such as liquid-liquid extraction, catalysis, and heat transfer, and these measurements may also be of use to researchers working in other fields. The ionic liquids used were 1-ethyl-3-methylimidazolium dicyanamide [emim][N(CN)(2)], 1,2-dimethyl-3-propylimidazolium bis(trifluoromethylsulfonyl)imide [dmpim] [Tf2N], and 1-butyl-1-methylpyrrolidinium tris(pentafluoroethyl)trifluorophosphate [bmpyr][Pf(3)PF(3)]. Glass transition temperatures, crystallization and melting temperatures, surface tensions, and viscosities are reported. The three ionic liquids displayed a range of crystallization behaviors when cooled to 123.15 K and reheated to 403.15 K. All liquids were Newtonian over a range of shear rates from (10 to 1000) s(-1). Viscosities decreased with temperature, and this has been modeled using the Williams-Landel-Ferry equation.

KW - surface-tension measurements

KW - physiocochemical properties

KW - electrochemical properties

KW - thermophysical properties

KW - temperature

KW - imidazolium

KW - conductivity

KW - ammonium

KW - viscosity

UR - http://www.scopus.com/inward/record.url?scp=77249094541&partnerID=8YFLogxK

U2 - 10.1021/je900405j

DO - 10.1021/je900405j

M3 - Article

VL - 55

SP - 778

EP - 782

JO - Journal of Chemical and Engineering Data

T2 - Journal of Chemical and Engineering Data

JF - Journal of Chemical and Engineering Data

SN - 0021-9568

IS - 2

ER -