Surface Modification of Li(NiCoMn)O₂ Cathode Materials by Nano-Al₂O₃ to Improve Electrochemical Performance in Lithium-Ion Batteries.

Al₂O₃-coated Li(NiCoMn)O₂ cathode materials were prepared by simple surface modification in water media through a sol-gel process with a dispersant. The crystallinity and surface morphology of the samples were characterized through X-ray diffraction analysis and scanning electron microscopy observation. The Li(NiCoMn)O₂ cathode material was of a polycrystalline hexagonal structure and agglomerated with particles of approximately 0.