在现场分析全固态金属电池的界面形态和化学演变
Xu-Sheng Zhang1,2, Jing Wan1,2, Zhen-Zhen Shen1,2
1CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, People's Republic of China.
Angewandte Chemie (International ed. in English)
|June 30, 2024
概括
在全固态金属电池 (ASSLMB) 中分析涂层和固体电解质间相 (SEI) 演变至关重要. 这项研究揭示了不同的界面行为,并开发了一种新的三明治电解质,以提高电池性能.
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:
- 优化全固态金属电池 (ASSLMB) 需要了解涂/脱落和固体电解质介相 (SEI) 演变.
- 在ASSLMB中分析埋藏的固体-固体接口具有挑战性,限制了多种表征技术的应用.
研究的目的:
- 直接检测形态/化学演变,涂/剥离动态,以及固体-固体界面上的SEI动态.
- 为了比较混合离子-电子导电 (LiwanagLi10GeP2S12) 和离子导电/电子隔离 (LiwanagLi3PS4) 接口的接口行为.
- 开发和评估一种新的三明治电解质,以提高ASSLMB的性能.
主要方法:
- 互补的现场表征,包括现场原子力显微镜 (AFM) 和现场X射线光电谱 (XPS).
- 在现场凯尔文探针力显微镜 (KPFM) 以可视化离子在接口上的行为.
- 制造和电化学测试一个 Li LPS-LGPS-LPS-Li Li LPS三明治电解质.
主要成果:
- 在LiidiyeLGPS和LiidiyeLPS接口之间观察到明显的接口演变和动态.
- 大约85%的固体电解质 (SSE) 在涂层过程中分解为SEI,在剥离过程中变化最小.
- 这种LPS-LGPS-LPS三明治电解质显示出增强的离子导电性,改善的界面稳定性,并减少了SSE分解 (25%).
结论:
- 在现场技术成功地揭示了ASSLMB的接口现象,区分了混合和离子导电接口.
- 开发的三明治电解质显著提高了接口稳定性和离子导电性,为高性能ASSLMB铺平了道路.
- 了解不同SSE接口的离子分布是设计先进固体电解质的关键.
相关概念视频
Interfacial Electrochemical Methods: Overview
235
Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current...
235
Electrogravimetric Analysis: Overview
219
Electrogravimetric analysis measures the weight of an analyte deposited electrolytically onto a suitable working electrode. This method involves applying a potential to a pre-weighed electrode submerged in a solution, which results in the desired substance being deposited through reduction at the cathode or oxidation at the anode. The electrode's weight is recorded after deposition, and the difference in weight gives the analyte's weight in the solution.
To test the completeness of the...
To test the completeness of the...
219


