POSITIVE ELECTRODE MATERIAL FOR LITHIUM SECONDARY BATTERY, METHOD FOR MANUFACTURING SAME, AND LITHIUM SECONDARY BATTERY COMPRISING SAME

Disclosed is a positive electrode material for a lithium secondary battery capable of improving the problems of resistance and lifetime deterioration of the battery by forming a thin and uniform metal oxide on the surface of the lithium nickel cobalt manganese-based positive electrode active materia...

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Bibliographische Detailangaben
Hauptverfasser: BAEK, Sora, HUR, Hyuck, KIM, Hakyoon, CHAE, Seulki, LEE, Donghun, KIM, Dong Hwi, KIM, Hyeongil, JUNG, Wang Mo
Format: Patent
Sprache:eng ; fre ; ger
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Zusammenfassung:Disclosed is a positive electrode material for a lithium secondary battery capable of improving the problems of resistance and lifetime deterioration of the battery by forming a thin and uniform metal oxide on the surface of the lithium nickel cobalt manganese-based positive electrode active material to suppress side reactions at the interface in contact with the electrolyte during the operation (during charging) of the battery, and thus reducing the generation and accumulation of resistance components including by-products and the rock salt phase, and the desorption of oxygen and the generation of gas in the electrolyte solution, and a method for preparing the same and a lithium secondary battery comprising the same. The method of preparing the positive electrode material for the lithium secondary battery comprises a method of coating a metal oxide on the surface of a lithium nickel cobalt manganese-based positive electrode active material through a chemical vapor deposition comprising a step of placing lithium nickel cobalt manganese-based positive electrode active material in a deposition apparatus and supplying a metal oxide precursor and a carrier gas, wherein the lithium nickel cobalt manganese-based positive electrode active material is stirred during deposition.