Composite positive active material, method of preparing the same, and positive electrode and lithium battery containing the material

Provided are a composite positive active material, a positive electrode and a lithium battery containing the composite positive active material, and a method of preparing the composite positive active material. The composite positive active material includes an over-lithiated lithium transition meta...

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Hauptverfasser:	MATULEVICH, EVGENIYA, SONG, JAY-HYOK, KANG, SUN-HO, YOU, YONGAN, KIM, CHANG-WOOK, PARK, JUN-SEOK
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F ELECTRICITY INORGANIC CHEMISTRY METALLURGY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:	Provided are a composite positive active material, a positive electrode and a lithium battery containing the composite positive active material, and a method of preparing the composite positive active material. The composite positive active material includes an over-lithiated lithium transition metal oxide having a layered structure, and a Li ion layer of Li 2 MnO 3 phase is doped with metal cation. Accordingly, a change in a discharging curve of a lithium battery including the composite positive active material is suppressed when charging and discharging proceed at high voltage, and accordingly, capacity and lifetime properties of the lithium battery improve.