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    Positive Electrode Active Material and Method of Preparing the Same
    2.
    发明公开
    Positive Electrode Active Material and Method of Preparing the Same 审中-公开

    公开(公告)号：US20240109789A1

    公开(公告)日：2024-04-04

    申请号：US18266839

    申请日：2022-02-03

    Applicant: LG Chem, Ltd.

    Inventor： Ji Hun Jung ,  Hyun Ah Park ,  Eung Ju Lee ,  Min Hee Son

    IPC: C01G53/00 ,  H01M10/052

    CPC classification number: C01G53/50 ,  H01M10/052 ,  C01P2004/03 ,  C01P2004/45 ,  C01P2006/40 ,  C01P2006/90

    Abstract: A positive electrode active material, a method of preparing the same, and a positive electrode and lithium secondary battery including the same are disclosed herein. In some embodiments, a positive electrode active material includes a lithium transition metal oxide which contains 60 mol % or more of nickel based on a total number of moles of transition metals excluding lithium in the lithium transition metal oxide, wherein the oxide is in a form of a secondary particle which is an aggregate of primary particles, wherein the lithium transition metal oxide satisfies Equation 1:




    1
    ≤

    x
    y

    ≤
    20




    Wherein x is a minimum area of a rectangle including all pores having an area greater than 0.002 μm2 among closed pores distributed in the secondary particle, and y is a total sum of areas of the pores having an area greater than 0.002 μm2 among the closed pores distributed in the secondary particle.

    Method of Preparing Positive Electrode Active Material Precursor and Positive Electrode Active Material Precursor
    5.
    发明申请
    Method of Preparing Positive Electrode Active Material Precursor and Positive Electrode Active Material Precursor 有权

    公开(公告)号：US20220006084A1

    公开(公告)日：2022-01-06

    申请号：US17428779

    申请日：2020-10-23

    Applicant: LG Chem, Ltd.

    Inventor： Eung Ju Lee ,  Ji Hun Jung ,  Jun Won Lee

    IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/04

    Abstract: A method of preparing a positive electrode active material precursor includes: providing a transition metal-containing solution including nickel, cobalt, and manganese; and introducing the transition metal-containing solution into a reactor, adding a basic aqueous solution and an ammonium cation-containing complex-forming agent, and performing a co-precipitation reaction to prepare a transition metal hydroxide in the form of a secondary particle formed by agglomerating primary particles. The co-precipitation reaction is performed under conditions satisfying Expression 1 described in the specification, and a positive electrode active material precursor whose crystalline grain has a controlled aspect ratio. A positive electrode active material prepared using the positive electrode active material precursor, a positive electrode for a lithium secondary battery, which includes the positive electrode active material, and a lithium secondary battery are also provided.

    Method of Preparing Positive Electrode Active Material Precursor for Lithium Secondary Battery and Positive Electrode Active Material Precursor Prepared by the Method
    8.
    发明申请
    Method of Preparing Positive Electrode Active Material Precursor for Lithium Secondary Battery and Positive Electrode Active Material Precursor Prepared by the Method 有权

    公开(公告)号：US20220123298A1

    公开(公告)日：2022-04-21

    申请号：US17432606

    申请日：2020-02-28

    Applicant: LG Chem, Ltd.

    Inventor： Eung Ju Lee ,  Ji Hun Jung ,  Duck Gyun Mok

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

    Abstract: A positive electrode active material precursor, a method of preparing the same, a positive electrode for a secondary battery and a lithium secondary battery which include the same are disclosed herein. In some embodiments, a method of preparing a positive electrode active material precursor includes adding a transition metal aqueous solution, an ammonium ion-containing solution, and a basic aqueous solution to an initial reaction solution, and performing a co-precipitation reaction to prepare a positive electrode active material precursor having an average particle diameter (D50) of 3 μm to 5 μm, wherein the transition metal aqueous solution including a nickel raw material, a cobalt raw material, and a manganese raw material, and wherein the initial reaction solution includes a metal additive, wherein the metal additive includes at least one element selected from the group consisting of Group 5 elements and Group 6 elements.

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