Johannes Haust, Yiran Guo, Jürgen Belz, Shamail Ahmed, Narges Adeli, Franziska Hüppe, Linus C. Erhard, Valeriu Mereacre, Jochen Rohrer, Anna-Lena Hansen, Helmut Ehrenberg, Karsten Albe, Joachim R. Binder, Kerstin Volz
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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.
期刊介绍：
Advanced Materials Interfaces publishes top-level research on interface technologies and effects. Considering any interface formed between solids, liquids, and gases, the journal ensures an interdisciplinary blend of physics, chemistry, materials science, and life sciences. Advanced Materials Interfaces was launched in 2014 and received an Impact Factor of 4.834 in 2018.
The scope of Advanced Materials Interfaces is dedicated to interfaces and surfaces that play an essential role in virtually all materials and devices. Physics, chemistry, materials science and life sciences blend to encourage new, cross-pollinating ideas, which will drive forward our understanding of the processes at the interface.
Advanced Materials Interfaces covers all topics in interface-related research:
Oil / water separation,
Applications of nanostructured materials,
2D materials and heterostructures,
Surfaces and interfaces in organic electronic devices,
Catalysis and membranes,
Self-assembly and nanopatterned surfaces,
Composite and coating materials,
Biointerfaces for technical and medical applications.
Advanced Materials Interfaces provides a forum for topics on surface and interface science with a wide choice of formats: Reviews, Full Papers, and Communications, as well as Progress Reports and Research News.
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