Elucidation of Liquid Structures and Transport Properties of Highly Concentrated LiN(SO2F)2/Ethylene Carbonate Electrolytes

被引：5
作者：
Furui, Reita [1 ]
Hayamizu, Kikuko [1 ]
Takahashi, Keitaro [1 ]
Tsuzuki, Seiji [1 ]
Miyauchi, Hibiki [1 ]
Inaba, Kohei [1 ]
Kawana, Yui [2 ]
Umebayashi, Yasuhiro [2 ]
Seki, Shiro [1 ]
机构：
[1] Kogakuin Univ, Grad Sch Appl Chem & Chem Engn, Hachioji, Tokyo 1920015, Japan
[2] Niigata Univ, Grad Sch Sci & Technol, Niigata, Niigata 9502181, Japan
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2023年 / 127卷 / 22期
关键词：
MULTIVARIATE CURVE RESOLUTION; BINARY SOLVENT SYSTEMS; ETHYLENE CARBONATE; SUPERCONCENTRATED ELECTROLYTES; TEMPERATURE-DEPENDENCE; SOLVATION STRUCTURE; DIFFUSION; STABILITY; VISCOSITY; CORROSION;
D O I：
10.1021/acs.jpcc.3c00887
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The Li+ conduction mechanism in highly concentrated ethylene carbonate (EC) solution of lithium bis(fluorosulfonyl)amide (LiFSA) was studied based on the measurements of thermal properties, density, viscosity, ionic conductivity, self-diffusion coefficients, Raman spectra, and proton nuclear magnetic resonance relaxation time. The compositions of EC and LiFSA were varied from dilute to concentrated states ([EC]/[LiFSA] = 9.2- 0.80). For compositions of [EC]/[LiFSA] < 1.5, the free solvents decrease, and contact ion pairs and aggregates become dominant, causing a significant change in the transport properties. Faster diffusion of Li+ compared with solvent (Li+ hopping conduction) was observed when the molar composition of [EC]/[LiFSA] < 1.0 as in the case of sulfolane.
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收藏
页码：10748 / 10756
页数：9
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