POSITIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERIES, PREPARATION METHOD THEREOF AND RECHARGEABLE LITHIUM BATTERIES INCLUDING THE SAME

POSITIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERIES, PREPARATION METHOD THEREOF AND RECHARGEABLE LITHIUM BATTERIES INCLUDING THE SAME

A positive active material includes a first positive active material in a secondary particle form in which a plurality of primary particles are aggregated, and a second positive active material in a single particle form, wherein each of the first positive active material and the second positive acti...

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Bibliographische Detailangaben
Hauptverfasser: KIM, Jinhwa, KIM, Minhan, CHAE, Youngjoo, SEOG, Jihyun
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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Zusammenfassung:A positive active material includes a first positive active material in a secondary particle form in which a plurality of primary particles are aggregated, and a second positive active material in a single particle form, wherein each of the first positive active material and the second positive active material includes a lithium nickel-based composite oxide having a nickel content of greater than or equal to about 70 mol % relative to the total elements excluding lithium and excluding oxygen, the first positive active material includes a coating portion in a form of a film on the surface of the secondary particle, the second positive active material includes a coating portion in a form of a film on the surface of the single particle, the coating portion of the first positive active material and the coating portion of the second positive active material includes lithium cobalt oxide and cobalt oxyhydroxide, respectively.