Samsung Sdi Co., Inc.

Kiyong Ahn

Jeuk Ha

Seonyoung Kwon

Jinyoung Kim

Jinhwa Kim

Donggyu Chang

Jungsue Jang

Minhan Kim

Yumi Song

Soonrewl Lee

Youngjoo Chae

Donghyun Kil

Eunok Oh

Jihyun Seog

Naoyuki Hase

Taehee Kwak

Jaeha Shim

Aram Choi

Jongmin Kim

Sung-Soo Park

Minkyu Kim

Sung Ho Choo

Youngsun Kong

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.

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 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 positive electrode for a rechargeable lithium battery includes a positive active material for a rechargeable lithium battery that includes a first positive active material including a secondary particle including at least two agglomerated primary particles, where at least a portion of the primary particles has a radial arrangement structure, and a second positive active material having a monolith structure, wherein the first and second positive active materials each include a nickel-based positive active material, and an X-ray diffraction (XRD) peak intensity ratio (I(003)/I(104)) of the positive electrode is greater than or equal to about 3. Further embodiments provide a method of manufacturing the positive electrode for rechargeable lithium battery, and a rechargeable lithium battery including the same.

Positive electrode for rechargeable lithium battery, preparing method thereof, and rechargeable lithium battery comprising positive electrode

A positive active material for a rechargeable lithium battery includes nickel-based lithium transition metal oxide secondary particles, in which a plurality of primary particles are aggregated. The primary particles include polycrystalline primary particles composed of 2 to 10 single crystals, and each of the single crystals has a particle diameter of about 0.5 &#x3bc;m to about 3 &#x3bc;m.

Positive active material 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 lithium metal oxide represented by the following Chemical Formula 1:(LiNaK)(CoZrM')O&#x2003;&#x2003;[Chemical Formula 1]wherein, 0&#x3c;x&#x2264;0.1, 0&#x2264;y&#x2264;0.1, 0&#x3c;x+y&#x2264;0.1, 0&#x3c;a&#x2264;0.1, 0&#x2264;b&#x2264;0.1 and 0&#x3c;a+b&#x2264;0.1, and M&#x2032; is at least one element selected from Y, Nb, V, Cr, Mn, Fe, Ni, Cu, Zn, Mg, Ca, and Sr.

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

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Yongin-si, South Korea

Kiyong Ahn