离子运输的机制在盐添加剂的zwitterionic聚合物支持的离子液电解质中
Meron Y Tadesse1, Zidan Zhang1, Nico Marioni1
1McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, USA.
The Journal of chemical physics
|January 8, 2024
概括
与基离子液体电解质相比,Zwitterionic离子凝显示了增强的离子运输特性. 这项研究揭示了聚二含量和盐度如何影响这些先进材料中的离子协调和运输机制.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 聚合物化学 聚合物化学
背景情况:
- 与传统的离子液体电解质相比,Zwitterionic离子凝显示出更高的导电性和转移数.
- 支持聚二的离子凝中这些改进特性背后的基本机制在很大程度上仍未被探索.
研究的目的:
- 系统地研究聚二 (polyZI) 含量和盐度对模型聚 (MPC) 离子凝的结构和动态特性的影响.
- 为了阐明在多分子聚合物 (MPC) 离子凝内的离子运输机制,并合理化实验观察.
主要方法:
- 运用计算建模来研究聚二甲基氧乙烯酸化胆 (poly-methacryloyloxyethyl phosphorylcholine) [poly-MPC) ]离子体的结构和动态特性.
- 分析包括在不同条件下检查离子协调与聚ZI,离子扩散性和离子传输机制.
主要成果:
- 确定了强大的-子相互作用,形成了一个物理网络.
- 增加的聚ZI含量增强了Li+协调,而增加的盐度则降低了它.
- 离子凝中的离子扩散率低于300K以上的基电解质,Li+运输涉及结构,车载和跳跃机制.
结论:
- 该研究提供了对zwitterionic ionogels中增强的离子运输的机制理解.
- 这些发现合理化了在离子凝和基电解质之间观察到的导电性交叉,突出了温度依赖于离子移动性的影响.
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