Journalartikel

Jahr der Veröffentlichung: 2022

Seiten: 2101100-

Zeitschrift: Advanced Materials Interfaces

Bandnummer: 9

Heftnummer: 8

ISSN: 2196-7350

DOI Link: https://doi.org/10.1002/admi.202101100

Verlag: Wiley

Abstract: 
The energy density of layered oxide cathode materials increases with their Ni content, while the stability decreases and degradation becomes more severe. A common strategy to mitigate or prevent degradation is the application of protective coatings on the particle surfaces. In this article, a room-temperature, liquid-phase reaction of trimethylaluminum (TMA) and tetraethyl orthosilicate (TEOS) with adsorbed moisture on either LiNi0.85Co0.10Mn0.05O2 or LiNiO2, yielding a hybrid coating that shows synergetic benefits compared to coatings from TMA and TEOS individually, is reported. The surface layer is investigated in long-term pouch full-cell studies as well as by electron microscopy, X-ray photoelectron spectroscopy, and differential electrochemical mass spectrometry, demonstrating that it prevents degradation primarily by a fluorine-scavenging effect, and by reducing the extent of rock salt-type phase formation.

Harvard-Zitierstil: Dreyer, S., Kretschmer, K., Tripkovic, D., Mazilkin, A., Chukwu, R., Azmi, R., et al. (2022) Multi-Element Surface Coating of Layered Ni-Rich Oxide Cathode Materials and Their Long-Term Cycling Performance in Lithium-Ion Batteries, Advanced Materials Interfaces, 9(8), p. 2101100. https://doi.org/10.1002/admi.202101100

APA-Zitierstil: Dreyer, S., Kretschmer, K., Tripkovic, D., Mazilkin, A., Chukwu, R., Azmi, R., Hartmann, P., Bianchini, M., Brezesinski, T., & Janek, J. (2022). Multi-Element Surface Coating of Layered Ni-Rich Oxide Cathode Materials and Their Long-Term Cycling Performance in Lithium-Ion Batteries. Advanced Materials Interfaces. 9(8), 2101100. https://doi.org/10.1002/admi.202101100