无机固体电解质相间组件的变形及其对提高其运输和机械性能的影响
Swastik Basu1, Gyeong S Hwang1
1McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas78712, United States.
ACS applied materials & interfaces
|December 14, 2023
概括
在离子电池中,氧化,碳酸和化的无形相表现出增强的离子导电性. 无形化是顶级导体,但需要气等杂质来稳定这些有益的阶段.
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
- 计算化学计算化学
背景情况:
- 固体电解质间相 (SEI) 对离子电池 (LIB) 的安全性和寿命至关重要.
- 了解氧化物,碳酸和化等单个SEI组件的特性是有限的.
- 讨论了它们在保护LIB阳极中的内在作用.
研究的目的:
- 调查无形SEI组件对机械和运输性能的影响.
- 为了比较无形相对晶体SEI相的离子导电性.
- 探索无形SEI阶段的稳定策略.
主要方法:
- 使用了第一原则计算.
- 分析了无形和晶体SEI组件的机械和运输特性.
- 研究了热力学稳定性和杂质的影响.
主要成果:
- 无形SEI相的离子导电性明显高于它们的晶体对应物.
- 无形化显示出优越的Li+离子运输能力,挑战了现有的理解.
- 无形SEI相在环境条件下热力学不稳定,倾向于重新结晶.
结论:
- 无形SEI相提供了改进的离子导电性,无形LiF特别有效.
- 稳定这些无形相,可能是通过的结合,是利用它们的好处的关键.
- 这项研究为LIBs设计更强大,更有效的SEI层提供了洞察力.
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