IMPROVED LITHIUM METAL OXIDE CATHODE MATERIALS AND METHOD TO MAKE THEM

A coated cathode material comprises a lithium metal oxide particulate having a surface at least partially coated with a coating comprised of a complex metal oxide of aluminum and a second metal that is lanthanum, yttria or combination thereof. The coated cathode material may be made by providing a l...

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Bibliographische Detailangaben
Hauptverfasser:	Olken Michael M, Klann John J
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTRICITY INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL INORGANIC CHEMISTRY METALLURGY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	A coated cathode material comprises a lithium metal oxide particulate having a surface at least partially coated with a coating comprised of a complex metal oxide of aluminum and a second metal that is lanthanum, yttria or combination thereof. The coated cathode material may be made by providing a lithium metal oxide particulate which is then contacted with a precursor compound that forms a complex metal oxide upon heating. The coated lithium metal oxide is then heated to a temperature sufficient to form the complex metal oxide, wherein the complex metal oxide is amorphous and contains aluminum and a second metal that is lanthanum, yttria or combination thereof and the complex metal oxide is bonded to the lithium metal oxide.