Samsung Sdi Co., Inc.

Doyu Kim

Jongmin Kim

Wooyoung Yang

Donggyu Chang

Provided is a nickel-based active material precursor for a lithium secondary battery, including: a secondary particle including a plurality of particulate structures, wherein each of the particulate structures includes a porous core portion and a shell portion including primary particles radially arranged on the porous core portion, and in 50% or more of the primary particles constituting a surface of the secondary particle, a major axis of each of the primary particles is aligned along a normal direction of the surface of the secondary particle. When the nickel-based active material precursor for a lithium secondary battery is used, it is possible to obtain a nickel-based active material which intercalates and deintercalates lithium and has a short diffusion distance of lithium ions.

Nickel-based active material precursor for lithium secondary battery, preparation method thereof, nickel-based active material for lithium secondary battery formed therefrom, and lithium secondary battery including cathode including the nickel-based active material

A nickel (Ni)-based active material for a lithium secondary battery, a preparing method thereof, and a lithium secondary battery including a positive electrode including the same. The Ni-based active material includes a secondary particle including a plurality of particulate structures, wherein each of the particulate structures includes a porous core portion and a shell portion including primary particles radially arranged on the porous core portion, and lithium phosphate is in the porous core portion, between the plurality of primary particles, and on the surface of the secondary particle. The Ni-based active material includes a porous inner portion including the porous core portion; and an outer portion comprising the the shell portion, and the Ni-based active material includes the porous inner portion having closed pores and the outer portion, wherein the porous inner portion has a density less than that of the outer portion, and the Ni-based active material has a net density of 4.7 g/cc or less.

Nickel-based active material precursor for lithium secondary battery, preparing method thereof, nickel-based active material for lithium secondary battery formed thereof, and lithium secondary battery comprising positive electrode including the nickel-based active material

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Yongin-si, South Korea

Doyu Kim