Lg Energy Solution, Ltd.

Lg Chem, Ltd

Gi Beom Han

Wang Mo Jung

Chi Ho Jo

Ji Hoon Ryu

Sang Wook Lee

Hyuck Hur

Dong Hun Lee

Tae Gu Yoo

Seul Ki Kim

Sungbin Park

Dong Hwi Kim

Jintae Hwang

Sung Joong Kang

Sang Min Park

Hong Kyu Park

Ji Hye Kim

So Ra Baek

Min Kyu You

Jung Min Han

Dae Jin Lee

Hak Yoon Kim

Sung Bin Park

Seong Hoon Kang

Jung Pil Lee

Sang Seung Oh

Eun Sol Lho

Younguk Park

Dong Chan Lee

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 method of preparing a positive electrode active material includes preparing a lithium transition metal oxide containing nickel in an amount of 60 mol % or more based on a total number of moles of metals excluding lithium, impregnating the lithium transition metal oxide with 300 ppm to 1,000 ppm of moisture based on 100 parts by weight of the lithium transition metal oxide, and performing a heat treatment on the lithium transition metal oxide impregnated with the moisture, wherein a lithium by-product present on a surface of the lithium transition metal oxide and the moisture react to form a passivation layer on the surface of the lithium transition metal oxide. A positive electrode active material prepared by the above-described preparation method, and a positive electrode and a lithium secondary battery which include the positive electrode active material are also provided.

Method of preparing positive electrode active material for lithium secondary battery and positive electrode active material prepared by the same

A lithium composite transition metal oxide includes nickel (Ni), cobalt (Co), and manganese (Mn), wherein the lithium composite transition metal oxide includes two or more kinds of first dopants selected from the group consisting of Zr, Al, V, Co, and Mg and two or more kinds of second dopants selected from the group consisting of Ti, Y, Sr, Nb, Ba, and Ca, and particles of the lithium composite transition metal oxide has a crystallite size of 170-300 nm.

Positive electrolyte active material for secondary battery, preparation method thereof, and lithium secondary battery including same

A positive electrode material for a lithium secondary battery includes a first positive electrode active material and a second positive electrode active material, both of which are lithium composite transition metal oxides containing transition metals. The first positive electrode active material has a larger average particle size (D) than the second positive electrode active material, wherein a ratio (Li/Me)of the mole number of lithium with respect to the total mole number of transition metals of the first positive electrode active material is more than 1 to 1.5 or less, and a ratio (Li/Me)of the mole number of lithium (Li) with respect to the total mole number of transition metals of the second positive electrode active material is 0.9 to 1. The second positive electrode active material has a crystallite size of 180 nm or more.

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

A positive electrode active material for a secondary battery is provided, which includes a lithium composite transition metal oxide including nickel (Ni), cobalt (Co), and manganese (Mn), wherein a particle of the lithium composite transition metal oxide includes a core portion and a resistance portion formed on a surface of the core portion, and is composed of a single particle, wherein the core portion has a layered crystal structure of space group R-3m, and the resistance portion has a cubic rock-salt structure of space group Fm-3m.

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

A method of producing a positive electrode material for a secondary battery includes preparing a lithium composite transition metal oxide containing nickel, cobalt, and manganese, forming a coating layer on a surface of the lithium composite transition metal oxide, and post-treating the lithium composite transition metal oxide having the coating layer formed thereon, wherein the post-treating is performed by exposing the lithium composite transition metal oxide having the coating layer formed thereon to moisture at a relative humidity of 10% to 50% at 25° C., and then heat treating the lithium composite transition metal oxide to remove residual moisture.

Method of producing positive electrode material for secondary battery

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 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 positive electrode active material includes a lithium-rich lithium manganese-based oxide,

Positive electrode active material comprising lithium-rich lithium manganese-based oxide and further comprising lithium tungsten compound, or additionally tungsten compound on the lithium-rich lithium manganese-based oxide, and positive electrode for lithium secondary battery comprising the same

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 invention relates to a method for recovering a positive electrode active material from a lithium secondary battery including: 1) separating a positive electrode into a collector and a positive electrode part; 2) removing an organic substance by firing the separated positive electrode part; 3) washing the fired resultant and removing remaining fluorine (F); 4) adding a lithium-containing material into the washed resultant and firing to recover a lithium transition metal oxide.

Method for recovering positive electrode active material from lithium secondary battery

The present invention relates to a positive electrode active material for a secondary battery, which comprises a core including a lithium composite metal oxide, and a surface treatment layer located on a surface of the core and including an amorphous oxide, wherein the amorphous oxide including silicon (Si), nitrogen (N) and at least one metal element selected from the group consisting of a Group 1A element, a Group 2A element, and a Group 3B element, and a method for preparing the same.

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

A device for preparing a lithium composite transition metal oxide includes first and second mixers continuously arranged in a direction in which a fluid proceeds, wherein the first mixer has a closed structure including a hollow fixed cylinder, a rotating cylinder having the same axis as that of the hollow fixed cylinder and having an outer diameter that is smaller than an inner diameter of the fixed cylinder, an electric motor to generate power for rotation of the rotating cylinder, a rotation reaction space, as a separation space between the hollow fixed cylinder and the rotating cylinder, in which ring-shaped vortex pairs periodically arranged along a rotating shaft and rotating in opposite directions are formed, first inlets through which raw materials are introduced into the rotation reaction space, and a first outlet to discharge a reaction fluid formed from the rotation reaction space.

Mixing device for preparing lithium composite transition metal oxide, lithium composite transition metal oxide prepared using the same, and method of preparing lithium composite transition metal oxide

Provided are a Si/C composite, in which carbon (C) is dispersed in an atomic state in a silicon (Si) particle, and a method of preparing the Si/C composite. Since the Si/C composite of the present invention is used as an anode active material, electrical conductivity may be further improved and volume expansion may be minimized. Thus, life characteristics of a lithium secondary battery may be improved.

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Daejeon, South Korea

Gi Beom Han