Multi?Element Surface Coating of Layered Ni?Rich Oxide Cathode Materials and Their Long?Term Cycling Performance in Lithium?Ion Batteries

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 is application protective coatings on particle surfaces. In this article, a room-temperature, liquid-phase reaction trimethylaluminum (TMA) tetraethyl orthosilicate (TEOS) adsorbed moisture either LiNi0.85Co0.10Mn0.05O2 LiNiO2, yielding hybrid coating that shows synergetic benefits compared from TMA TEOS individually, reported. surface layer investigated in long-term pouch full-cell studies as well by electron microscopy, X-ray photoelectron spectroscopy, differential electrochemical mass spectrometry, demonstrating it prevents primarily fluorine-scavenging effect, reducing extent rock salt-type phase formation.