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    POSITIVE ELECTRODE, AND LITHIUM SECONDARY BATTERY COMPRISING SAME
    4.
    发明公开
    POSITIVE ELECTRODE, AND LITHIUM SECONDARY BATTERY COMPRISING SAME 审中-公开

    公开(公告)号：EP4273955A1

    公开(公告)日：2023-11-08

    申请号：EP22760125.9

    申请日：2022-02-25

    申请人： LG ENERGY SOLUTION, LTD.

    发明人： LEE, Dong Hun ,  KIM, Hak Yoon ,  BAEK, So Ra ,  HUR, Hyuck ,  KIM, Dong Hwi ,  KIM, Hyeong Il ,  CHAE, Seul Ki ,  JUNG, Wang Mo

    IPC分类号： H01M4/131 ,  H01M4/525 ,  H01M4/505 ,  H01M10/052 ,  H01M4/02

    摘要： The present invention relates to a positive electrode for a lithium secondary battery, wherein the positive electrode of the present invention includes a positive electrode collector, a first positive electrode active material layer which is formed on the positive electrode collector and includes a first positive electrode active material, and a second positive electrode active material layer which is formed on the first positive electrode active material layer and includes a second positive electrode active material, wherein the first positive electrode active material and the second positive electrode active material include a lithium nickel-cobalt-based oxide in which an amount of nickel among total metallic components excluding lithium is 80 atm% or more, the first positive electrode active material has a molar ratio of nickel to cobalt of 18 or more, and the second positive electrode active material has a molar ratio of nickel to cobalt of less than 18.

    METHOD FOR MANUFACTURING LITHIUM SECONDARY BATTERY, AND LITHIUM SECONDARY BATTERY MANUFACTURED THEREBY
    7.
    发明公开
    METHOD FOR MANUFACTURING LITHIUM SECONDARY BATTERY, AND LITHIUM SECONDARY BATTERY MANUFACTURED THEREBY 审中-公开

    公开(公告)号：EP4203098A1

    公开(公告)日：2023-06-28

    申请号：EP21898364.1

    申请日：2021-10-22

    申请人： LG Energy Solution, Ltd.

    发明人： BAEK, So Ra ,  KIM, Hak Yoon ,  HUR, Hyuck ,  KIM, Dong Hwi ,  KIM, Hyeong Il ,  CHAE, Seul Ki ,  JUNG, Wang Mo ,  LEE, Dong Hun

    IPC分类号： H01M4/1391 ,  H01M4/36 ,  H01M4/62 ,  H01M4/525 ,  H01M4/505 ,  H01M10/052 ,  H01M4/38 ,  H01M4/48

    摘要： The present invention relates to a method of preparing a lithium secondary battery which includes steps (1) to (5) below.
    (1) preparing a first positive electrode active material by mixing a small particle lithium composite transition metal oxide having an average particle diameter (D 50 ) of less than 7 um with a boron-containing raw material and performing a heat treatment;
    (2) preparing a second positive electrode active material by mixing a large particle lithium composite transition metal oxide having an average particle diameter (D 50 ) of 8 um or more with a cobalt-containing raw material and a boron-containing raw material and performing a heat treatment;
    (3) mixing the first positive electrode active material and the second positive electrode active material to prepare a positive electrode material having a bimodal particle diameter distribution;
    (4) preparing a positive electrode by coating the positive electrode material on a positive electrode collector; and
    (5) assembling the positive electrode, a negative electrodeincluding a silicon-based negative electrode active material, and a separator

    POSITIVE ELECTRODE MATERIAL, AND POSITIVE ELECTRODE AND LITHIUM SECONDARY BATTERY COMPRISING SAME
    8.
    发明公开
    POSITIVE ELECTRODE MATERIAL, AND POSITIVE ELECTRODE AND LITHIUM SECONDARY BATTERY COMPRISING SAME 审中-公开

    公开(公告)号：EP4462513A1

    公开(公告)日：2024-11-13

    申请号：EP23756631.0

    申请日：2023-02-15

    申请人： LG Energy Solution, Ltd.

    发明人： PARK, Kang Joon ,  BAEK, So Ra ,  JUNG, Wang Mo ,  PARK, Sin Young ,  HUR, Hyuck ,  KIM, Dong Hwi ,  KWAK, Min ,  CHAE, Seul Ki

    IPC分类号： H01M4/525 ,  H01M4/505 ,  C01G53/00 ,  H01M10/052 ,  H01M4/02

    摘要： The present invention relates to a positive electrode material for a lithium secondary battery which includes a first positive electrode active material and a second positive electrode active material, wherein the first positive electrode active material includes a lithium transition metal oxide in which a molar ratio of nickel among transition metals is 70 mol% or more, the second positive electrode active material includes a lithium transition metal oxide in which a molar ratio of nickel among transition metals is 25 mol% or more less than the molar ratio of the nickel among the transition metals of the first positive electrode active material, an average particle diameter of primary particles constituting the second positive electrode active material is larger than an average particle diameter of primary particles constituting the first positive electrode active material, and D 50 of the second positive electrode active material is smaller than D 50 of the first positive electrode active material.