Samsung Sdi Co., Inc.

Yumi Song

Seonyoung Kwon

Joongho Moon

Kihyun Kim

Jinhwa Kim

Jaeho Lee

Kwanghwan Cho

Dohyung Park

Minkyu Kim

Mingzi Hong

Jeuk Ha

Eunok Oh

Minhan Kim

Kiyong Ahn

Soonrewl Lee

Soonbong Choi

Soohyeon Kim

Naoyuki Hase

Taehee Kwak

Jeonjin Choi

Gyuran Jeon

A positive electrode for a rechargeable lithium battery includes a positive active material including small particle diameter monolith particles having a particle diameter of about 1 μm to about 8 μm and including a first nickel-based lithium metal oxide, and large particle diameter secondary particles having a particle diameter of about 10 μm to about 20 μm and including a second nickel-based lithium metal oxide. An X-ray diffraction peak intensity ratio (I(003)/I(104)) of the positive electrode is greater than or equal to about 3. A rechargeable lithium battery includes the positive electrode.

Positive electrode for rechargeable lithium battery, method of preparing the same, and rechargeable lithium battery including the same

A positive active material for a rechargeable lithium battery includes a first compound represented by Chemical Formula 1 and a second compound represented by Chemical Formula 2, the second compound having a smaller particle size than that of the first compound, wherein cation mixing in the surface portion of the positive active material is less than or equal to about 7.5%, cation mixing in the bulk of the positive active material is less than or equal to about 3%, a residual lithium content on the surface of the positive active material is less than or equal to about 3,000 ppm, and the first compound and the second compound each independently include 90 at % to about 98 at % of Ni with respect to the metals excluding Li.LiNiCoMO,  Chemical Formula 1LiNiCoMO.  Chemical Formula 2

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

A positive electrode for a rechargeable lithium battery includes a positive active material including small particle diameter monolith particles having a particle diameter of about 1 &#x3bc;m to about 8 &#x3bc;m and including a first nickel-based lithium metal oxide, and large particle diameter secondary particles having a particle diameter of about 10 &#x3bc;m to about 20 &#x3bc;m and including a second nickel-based lithium metal oxide. An X-ray diffraction peak intensity ratio (I(003)/I(104)) of the positive electrode is greater than or equal to about 3. A rechargeable lithium battery includes the positive electrode.

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

Provided are a composite cathode active material for a lithium ion battery including a nickel-rich lithium nickel-based compound having a nickel content of 50 to 100 mol % based on a total content of transition metals; and a coating film including a rare earth metal hydroxide and disposed on the surface of the nickel-rich lithium nickel-based compound, a manufacturing method therefor, and a lithium ion battery including a cathode including the composite cathode active material.

Composite cathode active material for lithium ion battery, manufacturing method therefor, and lithium ion battery containing cathode 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 electrode active material includes a lithium composite oxide and a zirconium oxide coating layer and a lithium zirconium oxide coating layer that are in a form of sequential layers on the lithium composite oxide.

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

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Yongin-si, South Korea

Yumi Song