LiNbO3 Coatings on NCM622: Structure and Performance Insights

For enhancing the electrochemical performance of solid-state batteries (SSBs), protective coatings are applied on the cathode active material (CAM) to mitigate the degradation of the cathode/electrolyte interface. A comprehensive understanding of the structural properties of these coatings is crucial for further optimization. This study investigates the effect of LiNbO3-related coatings on LiNi0.6Co0.2Mn0.2O2 (NCM622) CAM, focusing on the relationship between coating structure and electrochemical performance in battery cells. Therefore, three samples calcinated at 550, 350 and, 80 °C temperature are analyzed with scanning transmission electron microscopy (STEM), energy dispersive X-ray spectroscopy (EDS), and scanning precession electron diffraction (SPED) in combination with a pair distribution function (PDF) analysis. The results reveal that only an amorphous LiNbO3 coating with a calcination temperature of 350 °C significantly improves the electrochemical performance of the CAM. In contrast, at higher calcination temperatures the coating crystallizes, while at lower calcination temperatures the coating becomes a mixed niobium oxide phase, both of which correlate with reduced battery performance.

Metadata

Relations

Is version of: https://doi.org/10.1002/admi.202500590

DOI

https://doi.org/10.17192/openumr/985

Publisher

Wiley

Language

en

Data types

JournalArticle

Keywords

battery cellNCMCAM

Funding

Funding Organisations:

Philipps-Universität Marburg

Project Information:Gefördert durch den Open-Access-Publikationsfonds der UB Marburg.

License

Attribution 4.0 International

URI

https://open.uni-marburg.de/handle/openumr/11388

Haust, Johannes; Guo, Yiran; Belz, Jürgen; Ahmed, Shamail; Adeli, Narges; Hüppe, Franziska; Erhard, Linus C.; Mereacre, Valeriu; Rohrer, Jochen; Hansen, Anna-Lena; Ehrenberg, Helmut; Albe, Karsten; Binder, Joachim R.; Volz, Kerstin: LiNbO3 Coatings on NCM622: Structure and Performance Insights. In: Advanced Materials Interfaces 12, no. 17 (2025): 12, e00590, Jg. (), S. 1-7. DOI: https://doi.org/10.17192/openumr/985.