Journalartikel
Autorenliste: Zuo, TT; Rueß, R; Pan, RJ; Walther, F; Rohnke, M; Hori, S; Kanno, R; Schröder, D; Janek, J
Jahr der Veröffentlichung: 2021
Seiten: 6669-
Zeitschrift: Nature Communications
Bandnummer: 12
Heftnummer: 1
Open Access Status: Gold
DOI Link: https://doi.org/10.1038/s41467-021-26895-4
Verlag: Nature Research
Abstract:
Fundamental investigations at the electrode/electrolyte interface are essential for developing high-energy batteries. Here, the authors investigate the degradation mechanisms at the LGPS/NCM622 interface providing a quantitative model to interpret the interfacial resistance growth.All-solid-state batteries are intensively investigated, although their performance is not yet satisfactory for large-scale applications. In this context, the combination of Li10GeP2S12 solid electrolyte and LiNi1-x-yCoxMnyO2 positive electrode active materials is considered promising despite the yet unsatisfactory battery performance induced by the thermodynamically unstable electrode|electrolyte interface. Here, we report electrochemical and spectrometric studies to monitor the interface evolution during cycling and understand the reactivity and degradation kinetics. We found that the Wagner-type model for diffusion-controlled reactions describes the degradation kinetics very well, suggesting that electronic transport limits the growth of the degradation layer formed at the electrode|electrolyte interface. Furthermore, we demonstrate that the rate of interfacial degradation increases with the state of charge and the presence of two oxidation mechanisms at medium (3.7 V vs. Li+/Li < E < 4.2 V vs. Li+/Li) and high (E >= 4.2 V vs. Li+/Li) potentials. A high state of charge (>80%) triggers the structural instability and oxygen release at the positive electrode and leads to more severe degradation.
Zitierstile
Harvard-Zitierstil: Zuo, T., Rueß, R., Pan, R., Walther, F., Rohnke, M., Hori, S., et al. (2021) A mechanistic investigation of the Li10GeP2S12|LiNi1-x-yCoxMnyO2 interface stability in all-solid-state lithium batteries, Nature Communications, 12(1), p. 6669. https://doi.org/10.1038/s41467-021-26895-4
APA-Zitierstil: Zuo, T., Rueß, R., Pan, R., Walther, F., Rohnke, M., Hori, S., Kanno, R., Schröder, D., & Janek, J. (2021). A mechanistic investigation of the Li10GeP2S12|LiNi1-x-yCoxMnyO2 interface stability in all-solid-state lithium batteries. Nature Communications. 12(1), 6669. https://doi.org/10.1038/s41467-021-26895-4
