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    Method of Preparing Positive Electrode Active Material for Lithium Secondary Battery and Positive Electrode Active Material Prepared by the Method
    12.
    发明申请
    Method of Preparing Positive Electrode Active Material for Lithium Secondary Battery and Positive Electrode Active Material Prepared by the Method 有权

    公开(公告)号：US20220119273A1

    公开(公告)日：2022-04-21

    申请号：US17421606

    申请日：2020-01-07

    Applicant: LG Chem, Ltd.

    Inventor： Ji A Shin ,  Kyung Lok Lee ,  Min Kyu You ,  Sang Soon Choi

    IPC: C01G53/04 ,  H01M10/052

    Abstract: A method of preparing a positive electrode active material includes mixing a lithium raw material with a high nickel-containing transition metal hydroxide containing nickel in an amount of 60 mol % or more based on a total number of moles of the transition metal hydroxide and sintering the mixture to prepare a positive electrode active material, wherein the sintering includes a sintering step of heat-treating at 700° C. to 900° C. for 8 hours to 12 hours, a cooling step of cooling to room temperature, and an aging step of having a holding time when a temperature reaches a specific point during the cooling step. A positive electrode active material which is prepared by the method and has a reduced moisture content, and a positive electrode for a lithium secondary battery and a lithium secondary battery which include the positive electrode active material are also provided.

    Method for Preparing Positive Electrode Active Material
    16.
    发明申请
    Method for Preparing Positive Electrode Active Material 有权

    公开(公告)号：US20250011189A1

    公开(公告)日：2025-01-09

    申请号：US18711264

    申请日：2023-04-04

    Applicant: LG Chem, Ltd.

    Inventor： Woo Ram Lee ,  Dong Jin Kim ,  Sang Soon Choi ,  Jae Geun Kim

    IPC: C01G53/00

    Abstract: present disclosure A method for preparing a positive electrode active material capable of implementing a battery excellent in both initial capacity and lifespan properties includes (A) mixing a positive electrode active material precursor containing 80 mol % or greater of nickel (Ni) in all metals with a lithium-containing raw material, and then performing primary firing on the mixture to prepare a primary fired product, and (B) mixing the primary fired product and a nickel compound, and then performing secondary firing on the mixture to prepare a lithium transition metal oxide. The nickel compound is added such that the mol % of nickel contained in the nickel compound is greater than 0.01 mol % to less than 0.15 mol % based on the total number of moles of the metals contained in the positive electrode active material precursor.

    Lithium secondary battery and production method thereof
    17.
    发明授权
    Lithium secondary battery and production method thereof 有权

    公开(公告)号：US12183930B2

    公开(公告)日：2024-12-31

    申请号：US17422583

    申请日：2020-01-16

    Applicant: LG Chem, Ltd.

    Inventor： Min Kyu You ,  Kyung Lok Lee ,  Ji A Shin ,  Sang Soon Choi

    IPC: H01M4/66 ,  H01M4/02 ,  H01M4/04 ,  H01M10/0525 ,  H01M50/105

    Abstract: 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.

    Method for preparing positive electrode active material
    20.
    发明授权
    Method for preparing positive electrode active material 有权

    公开(公告)号：US11258063B2

    公开(公告)日：2022-02-22

    申请号：US16628111

    申请日：2018-07-13

    Applicant: LG Chem, Ltd.

    Inventor： Sang Soon Choi ,  Seung Beom Cho ,  Hyun Ah Park ,  Won Sig Jung

    IPC: H01M4/525 ,  C01G53/00 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/02

    Abstract: A method of preparing a positive electrode active material which includes forming a pre-sintered mixture by adding a reaction mixture including a lithium raw material and a nickel-manganese-cobalt precursor to a first crucible and performing a primary heat treatment at a temperature of 500° C. to 800° C., and, after discharging the pre-sintered mixture from the first crucible, adding the pre-sintered mixture to a second crucible and performing a secondary heat treatment at a temperature of 700° C. to 1,000° C. to form a lithium nickel manganese cobalt-based positive electrode active material, wherein a volume of the pre-sintered mixture formed after the primary heat treatment is 20% to 50% of a volume of the reaction mixture added to the first crucible.

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