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    Method of Preparing Positive Electrode Active Material
    3.
    发明申请
    Method of Preparing Positive Electrode Active Material 有权

    公开(公告)号：US20230083070A1

    公开(公告)日：2023-03-16

    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 ,  H01M4/505 ,  H01M4/04 ,  C01G53/00

    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.

    CATHODE ACTIVE MATERIAL AND METHOD OF PREPARING THE SAME
    4.
    发明申请
    CATHODE ACTIVE MATERIAL AND METHOD OF PREPARING THE SAME 有权
    阴极活性材料及其制备方法

    公开(公告)号：US20150030928A1

    公开(公告)日：2015-01-29

    申请号：US14514987

    申请日：2014-10-15

    Applicant: LG CHEM, LTD.

    Inventor： Ick Soon Kwak ,  Seung Beom Cho ,  Hwa Seok Chae

    IPC: H01M4/505 ,  H01M4/04 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/36 ,  H01M4/62

    CPC classification number: H01M4/505 ,  H01M4/366 ,  H01M4/62 ,  H01M10/052 ,  H01M2220/20 ,  Y02E60/122

    Abstract: Provided are a cathode active material including polycrystalline lithium manganese oxide and a boron-containing coating layer on a surface of the polycrystalline lithium manganese oxide, and a method preparing the same.Since the cathode active material according to an embodiment of the present invention may prevent direct contact between the polycrystalline lithium manganese oxide and an electrolyte solution by including the boron-containing coating layer on the surface of the polycrystalline lithium manganese oxide, the cathode active material may prevent side reactions between the cathode active material and the electrolyte solution. In addition, since limitations, such as the Jahn-Teller distortion and the dissolution of Mn2+, may be addressed by structurally stabilizing the polycrystalline lithium manganese oxide, tap density, life characteristics, and charge and discharge capacity characteristics of a secondary battery may be improved.

    Abstract translation: 提供了一种包括多晶锂锰氧化物和多晶锂锰氧化物表面上的含硼涂层的阴极活性材料及其制备方法。 由于根据本发明的实施方案的阴极活性材料可以通过在多晶锂锰氧化物的表面上包含含硼涂层来防止多晶锂锰氧化物与电解质溶液之间的直接接触，所以阴极活性材料可以 防止正极活性物质与电解液之间的副反应。 另外，由于可以通过结构稳定多晶锂锰氧化物来解决诸如Jahn-Teller变形和Mn 2+的溶解的限制，可以提高二次电池的振实密度，寿命特性和充放电容量特性 。

    Cathode active material and method of preparing the same
    7.
    发明授权
    Cathode active material and method of preparing the same 有权

    公开(公告)号：US09905851B2

    公开(公告)日：2018-02-27

    申请号：US14514987

    申请日：2014-10-15

    Applicant: LG Chem, Ltd.

    Inventor： Ick Soon Kwak ,  Seung Beom Cho ,  Hwa Seok Chae

    IPC: H01M4/62 ,  H01M4/36 ,  H01M4/505 ,  H01M10/052

    CPC classification number: H01M4/505 ,  H01M4/366 ,  H01M4/62 ,  H01M10/052 ,  H01M2220/20 ,  Y02E60/122

    Abstract: Provided are a cathode active material including polycrystalline lithium manganese oxide and a boron-containing coating layer on a surface of the polycrystalline lithium manganese oxide, and a method preparing the same. Since the cathode active material according to an embodiment of the present invention may prevent direct contact between the polycrystalline lithium manganese oxide and an electrolyte solution by including the boron-containing coating layer on the surface of the polycrystalline lithium manganese oxide, the cathode active material may prevent side reactions between the cathode active material and the electrolyte solution. In addition, since limitations, such as the Jahn-Teller distortion and the dissolution of Mn2+, may be addressed by structurally stabilizing the polycrystalline lithium manganese oxide, tap density, life characteristics, and charge and discharge capacity characteristics of a secondary battery may be improved.

    Method of preparing positive electrode active material
    10.
    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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