Samsung Sdi Co., Inc.

Soonrewl Lee

Jongmin Kim

Young-Ki Kim

Ickkyu Choi

Soonkie Hong

Mingzi Hong

Jungjoon Park

Youngjoo Chae

Seonyoung Kwon

Yumi Song

Kiyong Ahn

Taehee Kwak

Kitae Kim

Wooyoung Yang

Young-Hun Lee

Jinhwa Kim

Minhan Kim

Jeuk Ha

Naoyuki Hase

Eunok Oh

Kisoo Lee

Jihyun Seog

Dong-Hwan Yu

Hyerim Lee

Jongsan Im

Jiyeon Jang

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 active material for a rechargeable lithium battery includes a first compound represented by Chemical Formula 1, and a second compound having a smaller particle diameter than the first compound and represented by Chemical Formula 2, wherein the first compound and the second compound have a Ni content of about 50 at % to about 60 at % based on a total amount of metal elements excluding Li. A rechargeable lithium battery including the first compound and the second compound satisfies Relation 1:V&#x3c;V&#x2264;3.6.&#x2003;&#x2003;[Relation 1]In Relation 1, Vis a voltage value at a point where a tangent line to a value corresponding to 50% of the first peak value intersects the line dQ/dV=0, and Vis a charge start voltage, as determined from a differential capacity (dQ/dV)-voltage charge/discharge plot.

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 first compound represented by Chemical Formula 1, and a second compound represented by Chemical Formula 2 and having a smaller particle diameter than the first compound, wherein at least one of the first compound and the second compound includes a core and a surface layer surrounding the core:LiNiCoMO,&#x2003;&#x2003;Chemical Formula 1LiNiCoMO,&#x2003;&#x2003;Chemical Formula 2wherein Mand Mare each independently at least one selected from Mn, Al, Cr, Fe, V, Mg, Ti, Zr, Nb, Mo, W, Cu, Zn, Ga, In, Sn, La, and Ce. The atomic concentration (at %) of nickel (Ni) with respect to the total amount of non-lithium metals is higher in the surface layer than in the core, and an amount of cation mixing is less than or equal to about 3%.

A positive active material for a rechargeable lithium battery includes a nickel-based lithium transition metal oxide including a secondary particle in which a plurality of primary particles are agglomerated, wherein the secondary particle includes a core and a surface layer surrounding the core, and the surface layer includes a plurality of primary particles and a nano-sized cobalt-based lithium transition metal oxide absorbed in the surface layer, between the primary particles.

A positive active material for use in a positive electrode and a rechargeable lithium battery includes a lithium cobalt oxide including a secondary particle having an average particle diameter of about 15 &#x3bc;m to about 25 &#x3bc;m, wherein the secondary particle includes a plurality of primary particles having an average particle diameter of about 2 &#x3bc;m to about 10 &#x3bc;m, and the positive active material has a pellet density of greater than or equal to about 3.80 g/cm. A method of manufacturing the positive active material includes heat-treating a cobalt-containing compound at a temperature of greater than or equal to about 900&#xb0; C. to form a cobalt oxide comprising CoOand CoO, and reacting the cobalt oxide with a lithium compound to prepare the lithium cobalt oxide.

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

A positive active material for a rechargeable lithium battery, and a rechargeable lithium battery and a battery module including the same are provided. The positive active material may include a lithium nickel-manganese-cobalt composite oxide with a coating layer on the surface. The coating layer on the surface may include a lithium oxide including Al and/or W, for example, Al and W.

Positive electrode for rechargeable lithium battery, rechargeable lithium battery including same and battery module

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Yongin-si, South Korea

Soonrewl Lee