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    Method of Preparing Positive Electrode Active Material for Lithium Secondary Battery and Positive Electrode Active Material Prepared by the Method
    1.
    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.

    Positive Electrode for Lithium Secondary Battery and Lithium Secondary Battery Including the Same
    7.
    发明申请
    Positive Electrode for Lithium Secondary Battery and Lithium Secondary Battery Including the Same 有权

    公开(公告)号：US20220131155A1

    公开(公告)日：2022-04-28

    申请号：US17428407

    申请日：2020-08-11

    Applicant: LG Chem, Ltd.

    Inventor： Joo Hong Jin ,  Min Kyu You ,  Sun Sik Shin ,  Kyung Lok Lee ,  Ji A Shin

    IPC: H01M4/62 ,  H01M10/052 ,  H01M4/36 ,  H01M4/131 ,  H01M4/525 ,  H01M4/02

    Abstract: 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 (D50), a conductive material, and a binder; and a carbon-based coating layer formed on a surface of the positive electrode active material layer. The two types of positive electrode active materials are each represented by Chemical Formula 1 below. The carbon-based coating layer includes a sphere-type conductive material and a binder, where the binder is included in an amount of 5 parts by weight or more and less than 10 parts by weight with respect to 100 parts by weight of the carbon-based coating layer. Li1+aNixCoyMzO2   [Chemical Formula 1] In Chemical Formula 1, 0≤a≤0.5, 0

    ELECTRODE ASSEMBLY HAVING HIGH FLEXIBILITY AND BATTERY CELL INCLUDING THE SAME
    10.
    发明申请
    ELECTRODE ASSEMBLY HAVING HIGH FLEXIBILITY AND BATTERY CELL INCLUDING THE SAME 审中-公开

    公开(公告)号：US20180287103A1

    公开(公告)日：2018-10-04

    申请号：US15767541

    申请日：2017-03-31

    Applicant: LG Chem, Ltd.

    Inventor： Min Kyu You ,  Sung Joong Kang ,  Ji Young Kim

    IPC: H01M2/02 ,  H01M10/04 ,  H01M10/0525 ,  H01M10/0587 ,  H01M2/08 ,  H01M2/16

    Abstract: 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: S[{1/ln(x/y)}*t]=R  1 wherein 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.

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