TY - JOUR
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
N1 - Funding Information:
The authors would like to thank the Ministry of Science and Technology of Taiwan for financially supporting this project. This research also received funding from the Headquarters of University Advancement at the National Cheng Kung University and Bureau of Energy, Ministry of Science and Technology, Taiwan.
Publisher Copyright:
© 2015 Taiwan Institute of Chemical Engineers.
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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U2 - 10.1016/j.jtice.2015.02.017
DO - 10.1016/j.jtice.2015.02.017
M3 - Article
AN - SCOPUS:84937635926
VL - 53
SP - 22
EP - 31
JO - Journal of the Taiwan Institute of Chemical Engineers
JF - Journal of the Taiwan Institute of Chemical Engineers
SN - 1876-1070
ER -