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    Methods of preparing positive electrode active material precursor for lithium secondary battery and positive electrode active material
    4.
    发明授权
    Methods of preparing positive electrode active material precursor for lithium secondary battery and positive electrode active material 有权

    公开(公告)号：US10892471B2

    公开(公告)日：2021-01-12

    申请号：US16333378

    申请日：2018-02-06

    申请人： LG Chem, Ltd.

    发明人： Sang Soon Choi ,  Hyun Ah Park ,  Won Sig Jung

    IPC分类号： H01M4/04 ,  C01G53/00 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/02 ,  H01M4/525

    摘要： A method of preparing a positive electrode active material precursor for a lithium secondary battery by using a batch-type reactor, which includes the steps of 1) forming positive electrode active material precursor particles while continuously adding a transition metal-containing solution including a transition metal cation, an aqueous alkaline solution, and an ammonium ion-containing solution to a batch-type reactor, 2) sedimenting the positive electrode active material precursor particles formed; 3) discharging a supernatant formed after the sedimentation of the positive electrode active material precursor particles to an outside; 4) adjusting a pH to 10 to 12 by adding the ammonium ion-containing solution; and 5) growing the positive electrode active material precursor particles while continuously again adding the transition metal-containing solution to the batch-type reactor, and a method of preparing a positive electrode active material using the same.

    Method for preparing positive electrode active material
    8.
    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

    申请人： LG Chem, Ltd.

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

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

    摘要： 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.