评估提高Li转移在盐在离子液体电解质中的策略:混合阳离子,协调离子和高盐度
Martin Lorenz1, Monika Schönhoff1
1Institute of Physical Chemistry, University of Münster, Corrensstrasse 28/30, Münster 48149, Germany.
The journal of physical chemistry. B
|March 9, 2024
概括
离子液体电解质对安全性有希望,但面临运输挑战. 通过将以太功能化和高FSI含量结合起来,可以克服-离子相关性,从而为电池应用提供高效的运输.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 电池技术 电池技术
背景情况:
- 离子液体电解质比传统的碳酸盐系统提供了更好的安全性.
- 仍然存在一些挑战,包括由于强烈的-离子相关性而导致的低导电性和缓慢的运输.
- 这些相关性导致车辆运输占主导地位,阻碍了实际应用.
研究的目的:
- 研究减少离子液体电解质中的离子协调的策略.
- 评估高盐度,混合离子组成和有机离子的以太功能化的相互作用.
- 为了增强大众市场电池应用的离子运输.
主要方法:
- 研究了两系列高度的离子液体电解质,含有不同和离子.
- 使用的乙基甲基 (EMIM) 和以太功能化的1-甲基乙基-1-甲基 (Pyr12O1) 电离子.
- 使用的混合双 () 硫 () 胺/双 () 三甲 () 胺 (FSI/TFSI) 阳离子.
主要成果:
- 来自FSI/TFSI离子的异质性增加并没有普遍改善运输特性.
- 总体来说,在电解质中FSI份额更高的情况下,观察到运输的改善.
- 以太功能化离子和高FSI含量的协同组合证明是成功的.
结论:
- 协同效应对于克服在离子液体中的汽车运输至关重要.
- 单一的策略,如高盐度或特定的离子是不够的.
- 功能化和特定离子的结合方法使结构性运输和改善的离子导电性成为可能.
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