A. A. Slesarenko, G. Z. Tulibaeva, A. V. Yudina, N. A. Slesarenko, A. F. Shestakov, O. V. Yarmolenko
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引用次数: 0
Abstract
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 °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.
以1 M LiN(SO2CF3)2为基料，在glymes和1,3-二恶烷的混合溶液中添加1 wt.%的聚乙烯氧化物（PEO），得到了新型低温凝胶电解质。电导率测定方法表明，在- 20°C下，所有组合物的电导率分别为7-8和3-4 mS cm - 1。采用电化学阻抗谱法研究了电解液与金属锂的界面。在二氧氯烷-二甲氧基乙烷-二lyme -四lyme (1:2:2: 1 v/v) + 1 wt.% PEO的混合物中，1 M LiN(SO2CF3)2的低温性能最佳。利用Li+阳离子溶剂化物配合物的量子化学模型，提出了一种改善glyme溶剂化物沿PEO链离子传输的机制。
期刊介绍：
Publishing nearly 500 original articles a year, by leading Scientists from Russia and throughout the world, Russian Chemical Bulletin is a prominent international journal. The coverage of the journal spans practically all areas of fundamental chemical research and is presented in five sections:
General and Inorganic Chemistry;
Physical Chemistry;
Organic Chemistry;
Organometallic Chemistry;
Chemistry of Natural Compounds and Bioorganic Chemistry.
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