期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 60, 期 12, 页码 6718-6723出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202015238
关键词
electrochemical energy storage; lithium metal anode; solid electrolyte interphase; solid-state batteries; x-ray photoelectron spectroscopy
资金
- Federal Ministry of Education and Research (BMBF) [03XP0117A, 03XP0176D]
- Projekt DEAL
This study investigates the formation of a reaction layer and stability issues between halide-based solid electrolytes and lithium, aiming to find methods for long-term stable and low impedance operation. The results show that halide-based lithium superionic conductors react with lithium metal, leading to unstable interfaces and increased resistance.
Owing to high ionic conductivity and good oxidation stability, halide-based solid electrolytes regain interest for application in solid-state batteries. While stability at the cathode interface seems to be given, the stability against the lithium metal anode has not been explored yet. Herein, the formation of a reaction layer between Li3InCl6 (Li3YCl6) and lithium is studied by sputter deposition of lithium metal and subsequent in situ X-ray photoelectron spectroscopy as well as by impedance spectroscopy. The interface is thermodynamically unstable and results in a continuously growing interphase resistance. Additionally, the interface between Li3InCl6 and Li6PS5Cl is characterized by impedance spectroscopy to discern whether a combined use as cathode electrolyte and separator electrolyte, respectively, might enable long-term stable and low impedance operation. In fact, oxidation stable halide-based lithium superionic conductors cannot be used against Li, but may be promising candidates as cathode electrolytes.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据