Lg Chem, Ltd

Lg Energy Solution, Ltd.

Min Kyu You

Wang Mo Jung

Chi Ho Jo

Hyuck Hur

Sung Bin Park

Jin Tae Hwang

Ho Suk Shin

Hong Kyu Park

Kyung Lok Lee

Ji A Shin

In Sung Uhm

Gi Beom Han

Sungbin Park

Sang Soon Choi

Jintae Hwang

Sung Joong Kang

Eun Kyung Mok

Ji Young Kim

Sun Sik Shin

Tae Gu Yoo

Younguk Park

Joo Hong Jin

Inseong Ju

Tae Gu You

A method of preparing a positive electrode active material for a secondary battery includes preparing a positive electrode active material precursor containing 60 mol % or more of nickel (Ni) among total metals, mixing the positive electrode active material precursor and a lithium raw material source and performing primary pre-sintering in an oxidizing atmosphere to form a pre-sintered product, and performing secondary main sintering on the pre-sintered product in an air atmosphere to form a lithium transition metal oxide.

Method of preparing positive electrode active material for secondary battery

A positive electrode includes: a positive electrode active material layer formed on a surface of a positive electrode current collector, including two types of positive electrode active materials with different average particle diameters (D), a conductive material, and a binder; and a carbon nanotube coating layer formed on a surface of the positive electrode active material layer, including carbon nanotubes and a binder: The two types of positive electrode active materials include first positive electrode active material particles which have an average particle diameter (D) of 8 μm to 20 μm and second positive electrode active material particles in the form of a single particle which have a smaller average particle diameter (D) than the average particle diameter (D) of the first positive electrode active material particles, and the positive electrode active material layer and the carbon nanotube coating layer are formed in a thickness ratio of 90:10 to 99:1.

Positive electrode for lithium secondary battery and lithium secondary battery including the same

A lithium secondary battery is disclosed herein. In some embodiments, a lithium secondary battery includes: a battery case having an interior region, a separator, wherein the separator divides the interior region into a first region and a second region, a positive electrode formed in the first region and including a positive electrode active material and positive electrode current collector particles; and a negative electrode formed in the second region and including a negative electrode active material and negative electrode current collector particles.

Lithium secondary battery and production method thereof

The present invention provides an electrode assembly having a one directionally spiral-wound structure with a separator sheet interposed between a positive electrode sheet and a negative electrode sheet, wherein the electrode assembly has a horizontal length (x) equal to or more than three times a vertical length (y), and both side end portions of the electrode assembly are bent together in the same direction by a curvature radius (R) satisfying the following Equation 1:[{1/ln()}*  1wherein t is an average thickness (mm) of the spiral-wound electrode assembly, x is the horizontal length of the electrode assembly, and y is the vertical length of the electrode assembly, and S is a constant of 8 or more, and ln(x/y)≥1.

Electrode assembly having high flexibility and battery cell including the same

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

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

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.

A positive electrode active material contains a lithium-rich lithium manganese-based oxide represented by chemical formula (1),LiNiCoMnMOA&#x2003;&#x2003;(1)

Positive electrode active material comprising lithium-rich lithium manganese-based oxide in which coating layer including lithium-deficient transition metal oxide is formed, and positive electrode for lithium secondary battery comprising the same

The present disclosure provides an electrode for a secondary battery, characterized in that a carbon nanotube sheet is provided on one surface or both surfaces of a current collector, and an electrode mixture layer containing an electrode active material is applied on the carbon nanotube sheet.

Electrode for secondary battery including carbon nanotube sheet

In one embodiment, the present disclosure relates to a positive electrode active material in which a lithium cobalt oxide is doped with a doping element including a metallic element and a halide element, wherein the positive electrode active material is represented by Formula 1 and satisfies Equation 1, and a positive electrode for a lithium secondary battery and a lithium secondary battery, either of which include the positive electrode active material:Li(CoMMM)OH&#x2003;&#x2003;[Formula 1](234)/()&#x3c;2.5.&#x2003;&#x2003;[Equation 1]

Positive electrode active material for lithium secondary battery, method of preparing the same, and positive electrode for lithium secondary battery and lithium secondary battery which include the positive electrode active material

The present invention provides a battery cell including: an electrode assembly configured of a positive electrode, a negative electrode, and a separation membrane; and a battery case in which a sealing surplus part is formed at an external circumference in a state that the electrode assembly is built in a receiving unit, wherein the battery case is formed of a sheet-shaped structure having a first surface and a second surface opposite to the first surface, an electrode terminal of the sheet-shaped structure is protruded through one side sealing surplus part of the battery case, and the electrode terminal is in contact with one surface or the other surface opposite to the one surface of the sealing surplus part in a state that the electrode terminal is bent in the first surface direction or the second surface direction of the battery case at the protrude part.

Pouch type battery cell including electrode lead of bending structure

The present invention provides an electrode assembly, including two or more positive electrode plates and two or more negative electrode plates laminated with each of separators interposed therebetween, wherein both side end portions of the electrode assembly are bent together in the same direction by a curvature radius (R) satisfying the following Equation 1:[{1/ln()}*]=&#x2003;&#x2003;1

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Daejeon, South Korea

Min Kyu You