Journal article

Authors list: Riegger, LM; Schlem, R; Sann, J; Zeier, WG; Janek, J

Publication year: 2021

Pages: 6718-6723

Journal: Angewandte Chemie International Edition

Volume number: 60

Issue number: 12

ISSN: 1433-7851

Open access status: Green

DOI Link: https://doi.org/10.1002/anie.202015238

Publisher: Wiley

Abstract: 
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.

Harvard Citation style: Riegger, L., Schlem, R., Sann, J., Zeier, W. and Janek, J. (2021) Lithium-Metal Anode Instability of the Superionic Halide Solid Electrolytes and the Implications for Solid-State Batteries, Angewandte Chemie International Edition, 60(12), pp. 6718-6723. https://doi.org/10.1002/anie.202015238

APA Citation style: Riegger, L., Schlem, R., Sann, J., Zeier, W., & Janek, J. (2021). Lithium-Metal Anode Instability of the Superionic Halide Solid Electrolytes and the Implications for Solid-State Batteries. Angewandte Chemie International Edition. 60(12), 6718-6723. https://doi.org/10.1002/anie.202015238