在固体电解质中解脱离子运输 间相:从组成到通过分子动力学模拟的接口动力学
Qianqian Wang1, Tairan Wang1,2, Pu Zhang1
1Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong, 999077, China.
Small (Weinheim an der Bergstrasse, Germany)
|June 4, 2025
概括
了解通过固体电解质间相 (SEI) 的离子运输对于电池性能至关重要. 分子动力学模拟显示,有机-无机SEI接口为离子运动提供了最高的能量障碍.
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
- 计算化学计算化学
背景情况:
- 通过固体电解质间相 (SEI) 进行离子传输对于离子电池 (LIB) 的性能和稳定性至关重要.
- 通过SEI进行离子传输的原子层次理解,包括热力学和动力学参数,仍然不完整.
研究的目的:
- 通过分子动力学 (MD) 模拟,系统地研究从电解质到SEI的完整离子运输过程.
- 确定不同SEI组件和接口之间控制离子传输的关键因素.
主要方法:
- 使用了分子动力学 (MD) 模拟.
- 模拟包括电解质,有机/无机SEI组件以及电解质/有机SEI和有机SEI/无机SEI接口.
主要成果:
- 有机SEI中的离子保持完全或部分溶解.
- 离子传输的最高能量障碍发生在有机-无机SEI接口上.
- 完整的离子溶解和有机和无机SEI层之间的结构差异有助于界面能量屏障.
结论:
- 该研究为整个SEI的离子运输提供了一个全面的免费能源景观.
- 提供了SEI组成,结构和界面动态之间的关系的见解.
- 这项工作促进了对限制离子电池性能因素的理解.
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