Composite cathode active material, cathode and lithium battery containing the same, and method of preparing the composite cathode active material

A composite cathode active material includes a first cathode active material including a core including a first lithium transition metal oxide represented by Formula 1 and having a first layered crystalline phase that belongs to a R-3m space group; and a coating layer disposed on the core and includ...

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Bibliographische Detailangaben
Hauptverfasser:	Park, Jinhwan, Song, Jayhyok, Yu, Byongyong, Choi, Byungjin
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:	A composite cathode active material includes a first cathode active material including a core including a first lithium transition metal oxide represented by Formula 1 and having a first layered crystalline phase that belongs to a R-3m space group; and a coating layer disposed on the core and including a second lithium transition metal oxide having a plurality of layered crystalline phases, wherein each layered crystalline phase of the plurality of layered crystalline phases has a different composition: Formula 1Li a MO 2 wherein, in Formula 1, 1.0¤a¤1.03; and M includes nickel and an element including a Group 4 element to a Group 13 element other than nickel.