Samsung Sdi Co., Inc.

Jihyun Seog

Jongmin Kim

Wooyoung Yang

Jinhwa Kim

Donggyu Chang

Minhan Kim

Jungsue Jang

Kiyong Ahn

Soonrewl Lee

Ickkyu Choi

Youngjoo Chae

Donghyun Kil

Jeuk Ha

Jinyoung Kim

Jaeha Shim

Aram Choi

Yuntaek Oh

Jongsan Im

Jungwoo Son

Disclosed are a positive active material for a rechargeable lithium battery, a method of preparing the same, and a rechargeable lithium battery including the same. The positive active material includes a first positive active material in a form of secondary particles including a plurality of primary particles that are aggregated together, and a second positive active material having a single particle form, wherein both of the first positive active material and the second positive active material are nickel-based positive active materials, each of the first positive active material and the second positive active material is coated with cobalt, and a maximum roughness of a surface of the second positive active material is greater than or equal to about 15 nm.

Positive active material for rechargeable lithium battery, preparing method thereof and rechargeable lithium battery including the same

Disclosed are a positive active material for a rechargeable lithium battery, a method of preparing the same, and a rechargeable lithium battery including the same. The positive active material includes a first positive active material in a form of secondary particles including a plurality of primary particles that are aggregated together, and a second positive active material having a single crystal form, wherein both of the first positive active material and the second positive active material are nickel-based positive active materials, each of the first positive active material and the second positive active material is coated with cobalt, and a maximum roughness of a surface of the second positive active material is greater than or equal to about 15 nm.

The application relates to a positive active material precursor including a transition metal composite oxide precursor. The transition metal composite oxide precursor exhibits a peak full width at half maximum of a (200) plane (2θ=about 42° to about 44°) in X-ray diffraction analysis in a range of about 0.3° to about 0.5°. The application also relates to a positive active material using the precursor, a method of preparing the same, and a positive electrode and a rechargeable lithium battery including the same.

Positive active material precursor, positive active material, method of preparing the same, positive electrode including the same and rechargeable lithium battery including the same

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Yongin-si, South Korea

Jihyun Seog