在Argyrodite基于全固态Li电池的界面演变的现场表征
Di Huang1, Gao Liu1, Wei Tong1
1Energy Storage and Distributed Resources Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720, USA.
Small (Weinheim an der Bergstrasse, Germany)
|September 23, 2024
概括
固态金属电池的接口稳定性至关重要. 这项研究揭示了电流密度如何影响涂层形态和固体电解质接口的化学分布,指导稳定的电池设计.
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
- 电池技术 电池技术
背景情况:
- 界面稳定性是全固态金属电池的一个主要挑战.
- 固体电解质的分解和在接口处的树生长导致细胞衰竭.
研究的目的:
- 为了研究在固态电池中涂/剥离过程中的界面演变.
- 为了阐明电流密度对固体电解质接口的影响.
主要方法:
- 为直接可视化开发一个全固态不对称的现场细胞.
- 光学显微镜用于实时观察涂/剥离.
- 使用扫描电子显微镜和能量分散式X射线光谱学进行尸检后分析.
主要成果:
- 电流密度显著影响 argyrodite 接口的演变.
- 低电流密度导致与立方的LiCl丰富接口.
- 高电流密度导致元素分布均,线成长.
结论:
- 这项研究阐明了固态金属电池中的动态界面演变机制.
- 这些发现为开发稳定的固体接口提供了指导,以提高电池性能.
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