Samsung Sdi Co., Inc.

Jinhwa Kim

Jongmin Kim

Donggyu Chang

Pilsang Yun

Seonyoung Kwon

Jangsuk Hyun

Jiyoon Kim

Kwanghwan Cho

Minhan Kim

Wooyoung Yang

Dohyung Park

Hyunbeom Kim

Jihyun Kim

Jungsue Jang

Joongho Moon

Yumi Song

Soohyeon Kim

Jihyun Seog

Kihyun Kim

Jaeho Lee

Mingzi Hong

Kiyong Ahn

Youngjoo Chae

Donghyun Kil

Jeuk Ha

Soonbong Choi

Jinyoung Kim

Junseok Park

Daehoe Lee

Jaehyun Shim

Juhyeong Han

Soonrewl Lee

Ickkyu Choi

Jaeha Shim

Aram Choi

KyoungHyun Kim

Jeonjin Choi

Yuntaek Oh

Jungwoo Son

Jongsan Im

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.

Disclosed are a cathode active material for a lithium secondary battery and a lithium secondary battery including the same. The cathode active material includes a secondary particle in which a plurality of primary particles are agglomerated, wherein the secondary particle has a predetermined arrangement structure in which (003) surface of primary particles are aligned to be in a vertical direction with respect to a tangent line at a point (P) at which the (003) surface of the primary particles meet a surface of the secondary particle.

Cathode active material for lithium secondary battery and lithium secondary battery including same

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

Provided are a nickel-based active material precursor for a lithium secondary battery including a core, an intermediate layer located on the core, and a shell located on the intermediate layer, wherein porosity gradually decreases in the order of the core, the intermediate layer, and the shell, and each of the intermediate layer and the shell has a radial arrangement structure, a method for producing the nickel-based active material precursor, a nickel-based active material produced therefrom, and a lithium secondary battery including a cathode containing the nickel-based active material.

Nickel active material precursor for lithium secondary battery, method for producing nickel active material precursor, nickel active material for lithium secondary battery produced by method, and lithium secondary battery having cathode containing nickel active material

A positive active material for a rechargeable lithium battery, a preparing method thereof, and a rechargeable lithium battery including the same are provided. The positive active material includes: a first positive active material in a form of secondary particles in which a plurality of primary particles are aggregated, wherein at least a portion of the primary particles have a radially arranged structure, and a second positive active material having a monolithic structure, wherein both 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 the 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 comprising positive electrode including positive active material

Provided are a nickel-based active material, a method of preparing the same, and a lithium secondary battery including a positive electrode including the nickel-based active material. The nickel-based active material includes at least one secondary particle including an aggregate of two or more primary particles, wherein at least a portion of the secondary particle has a radial array structure, and a hetero-element compound is positioned between the primary particles.

Nickel-based active material for lithium secondary battery, method of preparing the same, and lithium secondary battery including positive electrode including the nickel-based active material

A positive active material for a rechargeable lithium battery includes a first positive active material including a secondary particle including at least two agglomerated primary particles, where at least one part of the primary particles has a radial arrangement structure, as well as a second positive active material having a monolith structure. The first and second positive active materials may both include nickel-based positive active materials. A method of preparing the positive active material, and a rechargeable lithium battery including a positive electrode including the positive active material are also provided.

A nickel-based active material for a lithium secondary battery, a method of preparing the nickel-based active material, and a lithium secondary battery including a positive electrode including the nickel-based active material, the nickel-based active material comprising a secondary particle having an outer portion with a radially arranged structure and an inner portion with an irregular porous structure, wherein the inner portion of the secondary particle has a larger pore size than the outer portion of the secondary particle.

Provided are a nickel-based active material for a lithium secondary battery, a method of preparing the nickel-based active material, and a lithium secondary battery including a positive electrode including the nickel-based active material. The nickel-based active material includes at least one secondary particle that includes at least two primary particle structures, the primary particle structures each including a porous inner portion and an outer portion having a radially arranged structure, and the secondary particle including at least two radial centers.

A cobalt oxide for a lithium secondary battery, a method of preparing the cobalt oxide; a lithium cobalt oxide for a lithium secondary battery formed from the cobalt oxide; and a lithium secondary battery having a positive electrode including the lithium cobalt oxide, the cobalt oxide having a tap density of about 2.8 g/cc to about 3.0 g/cc, and an intensity ratio of about 0.8 to about 1.2 of a second peak at 2&#x3b8; of about 31.3&#xb1;1&#xb0; to a first peak at 2&#x3b8; of about 19&#xb1;1&#xb0; in X-ray diffraction spectra, as analyzed by X-ray diffraction.

Lithium cobalt oxide for a lithium secondary battery and lithium secondary battery comprising positive electrode including the same

A composite cathode active material, a cathode including the composite cathode active material, and a lithium battery including the cathode are provided. The composite cathode active material includes a core including a lithium metal oxide and a coating layer on the core, wherein the lithium metal oxide includes two or more transition metals including nickel (Ni), an amount of Ni within one mole of the two or more transition metals included in the lithium metal oxide is about 0.65 mol or greater, the coating layer includes LiF, and a resistance of the composite cathode active material is lower than that of the core.

Composite cathode active material, and cathode and lithium battery comprising composite cathode active material

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Yongin-si, South Korea

Jinhwa Kim