Impact of lithium salt addition on ionic transporting properties in a binary ionic liquid electrolyte composed of 4-(2-methoxyethyl)-4-methylmorpholinium bis(trifluoromethanesulfonyl)imide and LiTFSI

Yuan Chung Lin, Chung Wen Kuo, Ping-Lin Kuo, Lin Hao, Lan Yu Tseng, Tzi Yi Wu

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Abstract

We conducted a study on the transport properties of an ionic liquid 4-(2-methoxyethyl)-4-methylmorpholin-4-ium bis(trifluoromethylsulfonyl)amide ([MorMEOM][TFSI]) and lithium bis(trifluoromethanesulfonyl) imide (LiTFSI)-doped [MorMEOM][TFSI] at various temperature and atmospheric pressure states through conductivity, viscosity, and self-diffusion coefficient characterizations. Based on the Walden rule, the αvalues of neat [MorMEOM][TFSI] and LiTFSI-doped [MorMEOM][TFSI] estimated from the slopes of Walden plots were compared to those calculated from Ea,Λ/Ea,η. The diffusion coefficients of 1H, 19F and 7Li were determined using the PGSE-NMR method to carry out a study of the dynamics of the cations, anions, and ion pairs. All of the neat [MorMEOM][TFSI] and LiTFSI-doped [MorMEOM][TFSI] gave approximately straight lines for change in the D with Tη-1, demonstrating that the Stokes-Einstein equation holds for the ionic diffusivity in the ILs.

Original languageEnglish
Pages (from-to)22-31
Number of pages10
JournalJournal of the Taiwan Institute of Chemical Engineers
Volume53
DOIs
Publication statusPublished - 2015 Aug 1

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Ionic Liquids
Lithium
Ionic liquids
Electrolytes
Salts
Amides
Transport properties
Atmospheric pressure
Anions
Cations
Negative ions
Positive ions
Nuclear magnetic resonance
Viscosity
Ions
bis(trifluoromethanesulfonyl)imide
Temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

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title = "Impact of lithium salt addition on ionic transporting properties in a binary ionic liquid electrolyte composed of 4-(2-methoxyethyl)-4-methylmorpholinium bis(trifluoromethanesulfonyl)imide and LiTFSI",
abstract = "We conducted a study on the transport properties of an ionic liquid 4-(2-methoxyethyl)-4-methylmorpholin-4-ium bis(trifluoromethylsulfonyl)amide ([MorMEOM][TFSI]) and lithium bis(trifluoromethanesulfonyl) imide (LiTFSI)-doped [MorMEOM][TFSI] at various temperature and atmospheric pressure states through conductivity, viscosity, and self-diffusion coefficient characterizations. Based on the Walden rule, the αvalues of neat [MorMEOM][TFSI] and LiTFSI-doped [MorMEOM][TFSI] estimated from the slopes of Walden plots were compared to those calculated from Ea,Λ/Ea,η. The diffusion coefficients of 1H, 19F and 7Li were determined using the PGSE-NMR method to carry out a study of the dynamics of the cations, anions, and ion pairs. All of the neat [MorMEOM][TFSI] and LiTFSI-doped [MorMEOM][TFSI] gave approximately straight lines for change in the D with Tη-1, demonstrating that the Stokes-Einstein equation holds for the ionic diffusivity in the ILs.",
author = "Lin, {Yuan Chung} and Kuo, {Chung Wen} and Ping-Lin Kuo and Lin Hao and Tseng, {Lan Yu} and Wu, {Tzi Yi}",
year = "2015",
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T1 - Impact of lithium salt addition on ionic transporting properties in a binary ionic liquid electrolyte composed of 4-(2-methoxyethyl)-4-methylmorpholinium bis(trifluoromethanesulfonyl)imide and LiTFSI

AU - Lin, Yuan Chung

AU - Kuo, Chung Wen

AU - Kuo, Ping-Lin

AU - Hao, Lin

AU - Tseng, Lan Yu

AU - Wu, Tzi Yi

PY - 2015/8/1

Y1 - 2015/8/1

N2 - We conducted a study on the transport properties of an ionic liquid 4-(2-methoxyethyl)-4-methylmorpholin-4-ium bis(trifluoromethylsulfonyl)amide ([MorMEOM][TFSI]) and lithium bis(trifluoromethanesulfonyl) imide (LiTFSI)-doped [MorMEOM][TFSI] at various temperature and atmospheric pressure states through conductivity, viscosity, and self-diffusion coefficient characterizations. Based on the Walden rule, the αvalues of neat [MorMEOM][TFSI] and LiTFSI-doped [MorMEOM][TFSI] estimated from the slopes of Walden plots were compared to those calculated from Ea,Λ/Ea,η. The diffusion coefficients of 1H, 19F and 7Li were determined using the PGSE-NMR method to carry out a study of the dynamics of the cations, anions, and ion pairs. All of the neat [MorMEOM][TFSI] and LiTFSI-doped [MorMEOM][TFSI] gave approximately straight lines for change in the D with Tη-1, demonstrating that the Stokes-Einstein equation holds for the ionic diffusivity in the ILs.

AB - We conducted a study on the transport properties of an ionic liquid 4-(2-methoxyethyl)-4-methylmorpholin-4-ium bis(trifluoromethylsulfonyl)amide ([MorMEOM][TFSI]) and lithium bis(trifluoromethanesulfonyl) imide (LiTFSI)-doped [MorMEOM][TFSI] at various temperature and atmospheric pressure states through conductivity, viscosity, and self-diffusion coefficient characterizations. Based on the Walden rule, the αvalues of neat [MorMEOM][TFSI] and LiTFSI-doped [MorMEOM][TFSI] estimated from the slopes of Walden plots were compared to those calculated from Ea,Λ/Ea,η. The diffusion coefficients of 1H, 19F and 7Li were determined using the PGSE-NMR method to carry out a study of the dynamics of the cations, anions, and ion pairs. All of the neat [MorMEOM][TFSI] and LiTFSI-doped [MorMEOM][TFSI] gave approximately straight lines for change in the D with Tη-1, demonstrating that the Stokes-Einstein equation holds for the ionic diffusivity in the ILs.

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