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    Lithium Secondary Battery and Production Method Thereof
    2.
    发明申请
    Lithium Secondary Battery and Production Method Thereof 有权

    公开(公告)号：US20220102731A1

    公开(公告)日：2022-03-31

    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 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/02

    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
    7.
    发明申请
    Method for Preparing Positive Electrode Active Material 有权

    公开(公告)号：US20210036317A1

    公开(公告)日：2021-02-04

    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 ,  H01M4/505 ,  H01M10/0525 ,  C01G53/00

    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.

    Method of preparing positive electrode active material
    9.
    发明授权
    Method of preparing positive electrode active material 有权

    公开(公告)号：US12126019B2

    公开(公告)日：2024-10-22

    申请号：US17799752

    申请日：2021-06-14

    Applicant: LG Chem, Ltd.

    Inventor： Ick Soon Kwak ,  Chang Wan Chae ,  Sang Soon Choi ,  Hwa Seok Chae

    IPC: H01M4/525 ,  C01G53/00 ,  H01M4/02 ,  H01M4/04 ,  H01M4/505

    CPC classification number: H01M4/525 ,  C01G53/50 ,  H01M4/0471 ,  H01M4/505 ,  C01P2002/52 ,  C01P2004/84 ,  C01P2006/40 ,  H01M2004/028

    Abstract: A method of preparing a positive electrode active material is disclosed herein. In some embodiments, the method includes firing a first mixture at 400° C. to 700° C. to prepare a primary firing product, wherein the first mixture has a positive electrode active material precursor having a specific composition, a first lithium-containing source material, and optionally, an aluminum-containing source material, and firing a second mixture at a temperature above the firing temperature of the first mixture to prepare a positive electrode active material, wherein the second mixture has the primary firing product, a second lithium-containing source material, and a specific doping element M1-containing source material. The method is capable of degrading the cake strength of a primary firing product and providing a positive electrode active material having excellent quality by dividing a firing process into two steps.

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