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|
| Type |
Poster Presentation |
| Area |
Physical Chemistry |
| Room No. |
Event Hall |
| Time |
4월 20일 (금요일) 11:00~12:30 |
| Code |
PHYS.P-120 |
| Subject |
Spectroscopic And Computational Studies To Advanced Electrolytes
-Solvation And Molecular Structure Of LiTFSI In Acetonitrile- |
| Authors |
WooTaek Song, kyungwon Kwak*
Department of Chemistry, Korea University, Korea
|
| Abstract |
Acetonitrile(AN) is an attractive material as solvent of the lithium-ion batteries due to two major characters – the most oxidative-tolerant organic solvent and high dielectric constant leading to high ionic conductivity. Unfortunately extensive applications of AN in batteries have not been found yet due to its poor reductive stability. However this problem was completely solved by adopting superconcentrated Lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) in AN solution(>4.0M). With the concentration increasing, it is known that not only does LUMO of TFSI- ion become lower than that of AN causing to hinder the reduction of AN by lithium metal but the solvation structure also has a change. Herein, we mainly demonstrate the interaction between lithium ion and acetonitrile, and the solvation structure of TFSI- depending on the concentration where FTIR, Raman measurements and DFT calculation are used. It was found that there are some changes about Li+ion-AN interaction and the molecular & solvation structure of TFSI- ion as the solution gets thicker. |
| E-mail |
yg01102@naver.com |
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121st General Meeting of the KCS