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离子液体的导电性在散装和纳米孔透过程中
Yun Dong1, Martin Steinhart2, Hans-Jürgen Butt3
1Max Planck Institute for Polymer Research, 55128 Mainz, Germany.
The journal of physical chemistry. B
|July 27, 2023
概括
纳米孔中的离子液体 (IL) 显示出由于孔壁上的离子固定而降低的导电性. 修改孔隙表面可以部分恢复导电性,突出限制限制.
科学领域:
- 材料科学 材料科学 材料科学
- 物理化学 物理化学
- 纳米技术 纳米技术
背景情况:
- 离子液体 (ILs) 对于能源应用至关重要,但它们在纳米孔中的行为仍然不清楚.
- 限制对ILs中离子流动性的影响尚未完全理解,这阻碍了它们在能源材料中的应用.
研究的目的:
- 为了研究[BMIM]+基ILs在封闭状态下的自我组装,热力学和离子导电性.
- 了解纳米孔封闭如何影响离子液体的相位行为和离子动态.
主要方法:
- 对六种基于[BMIM]+的离子液体进行系统研究,其离子数量不同.
- 使用测量导电性,粘度和相变的技术分析散装和受限ILs.
- 在限制条件下构建有效的相位图.
主要成果:
- 由于静电相互作用,玻璃温度,粘度和导电性等散装IL特性发生了显著的变化.
- 封闭阻止了在散装IL中观察到的结晶,并降低了直流导电性,表明在孔壁上的离子固定.
- 毛孔的有效粘度与散装相似,但导电性下降,这表明墙壁相互作用是关键.
结论:
- 与散装相比,纳米孔封闭改变了IL阶段行为和离子流动性.
- 孔壁上的离子固定是限制ILs中减少导电性的主要因素.
- 纳米孔的表面修饰可以减轻导电性损失,为能源应用控制IL行为提供了一条途径.
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