Low-temperature gelled electrolytes based on the salt LiN(SO2CF3)2 in mixed glyme solutions for lithium power sources

被引:0
|
作者
Slesarenko, A. A. [1 ]
Tulibaeva, G. Z. [1 ]
Yudina, A. V. [1 ]
Slesarenko, N. A. [1 ]
Shestakov, A. F. [1 ,2 ]
Yarmolenko, O. V. [1 ]
机构
[1] Russian Acad Sci, Fed Res Ctr Problems Chem Phys & Med Chem, 1 Prosp Akad Semenova, Chernogolovka 142432, Moscow, Russia
[2] Lomonosov Moscow State Univ, Fac Fundamental Phys & Chem Engn, Build 51,1 Leninskie Gory, Moscow 119991, Russia
关键词
low-temperature gelled electrolytes; polyethylene oxide; LiTFSI; glymes; 1,3-dioxolane; solvates; lithium power sources; conductometry; electrochemical impedance; quantum chemical modeling; BATTERIES; PERFORMANCE; SOLVATION;
D O I
10.1007/s11172-024-4442-0
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
New low-temperature gelled electrolytes based on 1 M LiN(SO2CF3)2 in mixed solutions of glymes and 1,3-dioxolane with the addition of 1 wt.% polyethylene oxide (PEO) were obtained. The conductometry method was used to demonstrate that all the compositions have a conductivity of 7-8 and 3-4 mS cm-1 at 20 at -20 degrees C, respectively. The interface between the electrolyte and the metallic lithium was investigated using electrochemical impedance spectroscopy. The composition 1 M LiN(SO2CF3)2 in a mixture of dioxolane-dimethoxyethane-diglyme-tetraglyme (1: 2: 2: 1 v/v) + 1 wt.% PEO was found to be the best for low temperatures. Quantum chemical modeling of solvate complexes of the Li+ cation was used to propose a mechanism for improving ion transport from glyme solvates along the PEO chain.
引用
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页码:3267 / 3274
页数:8
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