Lg Energy Solution, Ltd.

Lg Chem, Ltd

Hyuck Hur

Wang Mo Jung

Chi Ho Jo

Sung Bin Park

Bo Ram Lee

Min Kyu You

Sungbin Park

Jin Tae Hwang

Young Uk Park

Gi Beom Han

Younguk Park

Jiyoung Park

Seul Ki Kim

Ji Young Park

Ji-Young Park

Young Cheol Choi

Bo-Ram Lee

Wang-Mo Jung

Chi-Ho Jo

Sung-Bin Park

Jung-Min Han

Dong Hun Lee

Tae Gu Yoo

So Ra Baek

Dong Hwi Kim

Jintae Hwang

Hak Yoon Kim

Jungmin Han

Hyeong Il Kim

Seul Ki Chae

Inseong Ju

Tae Gu You

A surface of a LiCoO-based positive electrode active material to have a rock salt crystal structure is provided. Specifically, a positive electrode active material for a lithium rechargeable battery is provided, including: a core particle containing lithium cobalt oxide doped with aluminum (Al); and a coating layer positioned on a surface of the core particle and containing a cobalt (Co)-based compound having a rock salt crystal structure. A method of producing the positive electrode active material is also provided using a solid-phase method. The positive electrode active material can be applied to a positive electrode, lithium rechargeable battery, battery module, battery pack, and the like.

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

A positive electrode and a lithium secondary including the same is disclosed herein. In some embodiments, the positive electrode includes a positive electrode current collector, a first positive electrode active material layer and a second positive electrode active material layer sequentially stacked on the positive electrode current collector, wherein the first positive electrode active material layer and the second positive electrode active material layer include a bimodal positive active material, the first positive electrode active material layer includes small-diameter particles in the form of single particles, and the second positive electrode active material layer includes small-diameter particles in the form of secondary particles. The positive electrode has improved capacity, efficiency, lifespan, output properties, and thermal stability.

Positive electrode and lithium secondary battery including the same

A positive electrode active material particle includes a core that contains lithium cobalt oxide represented by the following Chemical Formula LiCoMOAand a shell that is coated on the surface of the core and contains composite metal oxide of a metal with an oxidation number of +2 and a metal with an oxidation number of +3. In particular, M is at least one selected from the group consisting of Ti, Mg, Zn, Si, Al, Zr, V, Mn, Nb and Ni. A is oxygen-substitutional halogen and 1.00≤a≤1.05, 0≤x≤0.05, and 0≤y≤0.001.

Positive electrode active material particle including core containing lithium cobalt oxide and shell containing composite metal oxide and preparation method thereof

A method for preparing a lithium cobalt-based positive electrode active material and a positive electrode active material prepared by the method are provided. The method includes dry-mixing and then heat treating a lithium cobalt oxide particle represented by Formula 1 and one or more lithium metal oxide particle selected from the group consisting of lithium aluminum oxide, lithium zirconium oxide, and lithium titanium oxide.

Lithium cobalt-based positive electrode active material, preparation method thereof, positive electrode including same, and secondary battery including positive electrode

The present invention provides a positive active material for a rechargeable lithium battery, the active material including a dopant and having a crystalline structure in which metal oxide layers (MO layers) including metals and oxygen and reversible lithium layers are repeatedly stacked, wherein in a lattice configured by oxygen atoms of the MO layers adjacent to each other, the dopant time of charge, thereby forming a lithium trap and/or lithium dumbbell structure.

Positive electrode active material for lithium secondary battery, comprising lithium cobalt oxide for high voltage, and method for preparing same

A positive electrode active material for a secondary battery is provided. The positive electrode active material being a lithium cobalt-based oxide includes a doping element M. A lithium cobalt-based oxide particle containing the doping element M in an amount of 3,000 ppm or more, wherein in a bulk portion corresponding to 90% of a core side among the radius from a core of the particle to a surface thereof, the doping element M in the lithium cobalt-based oxide particle is contained at a constant concentration, and in a surface portion from the surface of the particle to 100 nm in a core direction, the doping element M is contained at a concentration equal to or higher than that in the bulk portion and has a concentration in which the concentration thereof is gradient gradually decreased in the core direction from the surface of the particle.

Positive electrode active material for secondary battery, method for preparing the same, and lithium secondary battery including the same

The present invention provides a positive electrode active material precursor for a secondary battery which includes primary particles of CoOor CoOOH, wherein the primary particle contains a doping element in an amount of 3,000 ppm or more, and has an average particle diameter (D) of 15 &#x3bc;m or more, and a positive electrode active material for a secondary battery which includes particles of a lithium cobalt-based oxide, wherein the primary particle contains a doping element in an amount of 2,500 ppm or more, and has an average particle diameter (D) of 15 &#x3bc;m or more.

Positive electrode active material precursor for secondary battery, positive electrode active material, and lithium secondary battery including the same

A positive electrode active material contains a lithium-rich lithium manganese-based oxide, wherein the lithium manganese-based oxide has a composition of the following chemical formula (1), and wherein a lithium ion conductive glass-ceramic solid electrolyte layer containing at least one selected from the group consisting of thio-LISICON(thio-lithium super ionic conductor), LISICON(lithium super ionic conductor), LiS&#x2014;SiS&#x2014;LiSiO, and LiS&#x2014;SiS&#x2014;PS&#x2014;Lil is formed on the surface of the lithium manganese-based oxide particle:LiMMnOQ&#x2003;&#x2003;(1)

High voltage positive electrode active material including lithium manganese-based oxide and method for producing the same

A lithium cobalt-based positive electrode active material is provided. The lithium cobalt-based positive electrode active material includes a core portion including a lithium cobalt-based oxide represented by Formula 1 and a shell portion including a lithium cobalt-based oxide represented by Formula 2, wherein the lithium cobalt-based positive electrode active material includes 2500 ppm or more, preferably 3000 ppm or more of a doping element M based on the total weight of the positive electrode active material. An inflection point does not appear in a voltage profile measured during charging/discharging a secondary battery including the lithium cobalt-based positive electrode active material.

Lithium cobalt-based positive electrode active material, preparation method thereof, positive electrode and secondary battery including the same

Provided is a cobalt precursor for preparing a lithium cobalt oxide of a layered structure which is included in a positive electrode active material, wherein the cobalt precursor is cobalt oxyhydroxide (CoM'OOH) doped with, as dopants, magnesium (Mg) and M&#x2032; different from the magnesium.

Metal-doped cobalt precursor for preparing positive electrode active material for secondary battery

A surface of a LiCoO-based positive electrode active material to have a rock salt crystal structure is provided. Specifically, a positive electrode active material for a lithium rechargeable battery is provided, including: a core particle containing lithium cobalt oxide doped with aluminum (Al); and a coating layer positioned on a surface of the core particle and containing a cobalt(Co)-based compound having a rock salt crystal structure. A method of producing the positive electrode active material is also provided using a solid-phase method. The positive electrode active material can be applied to a positive electrode, lithium rechargeable battery, battery module, battery pack, and the like.

A lithium cobalt-based positive electrode active material is provide, which includes sodium and calcium, wherein the total amount of the sodium and calcium is 150 ppm to 500 ppm based on the total weight of the lithium cobalt-based positive electrode active material. A method for preparing the lithium cobalt-based positive electrode active material is also provided.

Provided are a metal element-doped positive electrode active material for a high voltage and a preparation method thereof. The positive electrode active material may include a lithium cobalt oxide having a layered crystal structure; and a metal element (M) incorporated into the lithium cobalt oxide in an amount of 0.2 parts by weight to 1 part by weight with respect to 100 parts by weight of the lithium cobalt oxide, wherein the metal element (M) does not form a chemical bond with the elements of the lithium cobalt oxide, and wherein the layered crystal structure in maintained at a positive electrode potential of more than 4.5 V (based on Li potential) when fully charged.

Metal-doped positive electrode active material for high voltage

A negative electrode active material including lithium titanium oxide particles, wherein the lithium titanium oxide particles have a Na content of 50 ppm-300 ppm, a K content of 500 ppm-2400 ppm and a crystallite size of 100-200 nm, and a lithium secondary battery including the same.

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Daejeon, South Korea

Hyuck Hur