Samsung Sdi Co., Inc.

Jeonjin Choi

Dohyung Park

Minhan Kim

Dongjin Kim

Gyuran Jeon

Jinhwa Kim

Joong-Ho Moon

Seonyoung Kwon

Joongho Moon

Sun-Ho Kang

Yumi Song

Haneol Park

ILseok Kim

Daehoe Lee

Junseok Park

KyoungHyun Kim

Okgyu Lim

Ilseok Kim

The present disclosure relates to a cathode active material for a lithium secondary battery, a method for preparing same, and a lithium secondary battery comprising same, the cathode active material comprising a lithium-nickel compound oxide, wherein a c-axis lattice parameter of a unit lattice of the lithium-nickel compound oxide satisfies Formula 1:14.1720 &#x212b;A&#x2264;c&#x2264;14.1750 &#x212b;A&#x2003;&#x2003;[Formula 1]

Cathode active material for lithium secondary battery, method for producing same, and lithium secondary battery comprising same

A positive electrode active material for a lithium secondary battery, a method of preparing the same, and a lithium secondary battery, the positive electrode active material including nickel, cobalt, and manganese, wherein the positive electrode active material has a core part and a surface part, an amount of manganese in the core part and the surface part is higher than 25 mol %, and amounts of nickel and cobalt in the positive electrode active material vary such that a concentration gradient of the nickel and the cobalt in a direction from the core part to the surface part is present in the positive electrode active material.

Positive electrode active material for lithium secondary battery, preparing method thereof, and lithium secondary battery including positive electrode including the same

A positive active material represented by Formula 1 and a lithium secondary battery having a positive electrode that includes the positive active material are provided:LiANiCoMnO&#x2003;&#x2003;Formula 1

Positive active material and lithium secondary battery including positive electrode that includes the positive active material

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Yongin-si, South Korea

Jeonjin Choi