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    Positive Electrode and Lithium Secondary Battery Including the Same
    81.
    发明公开
    Positive Electrode and Lithium Secondary Battery Including the Same 审中-公开

    公开(公告)号：US20230155127A1

    公开(公告)日：2023-05-18

    申请号：US17922833

    申请日：2022-01-28

    Applicant: LG Energy Solution, Ltd.

    Inventor： Dong Hwi Kim ,  Hak Yoon Kim ,  So Ra Baek ,  Hyuck Hur ,  Hyeong Il Kim ,  Seul Ki Chae ,  Wang Mo Jung ,  Dong Hun Lee

    IPC: H01M4/525 ,  H01M10/052

    CPC classification number: H01M4/525 ,  H01M10/052 ,  H01M2004/028

    Abstract: A positive electrode and a lithium secondary including the same is disclosed herein. In some embodiments, the positive electrode includes a positive electrode current collector, a first positive electrode active material layer and a second positive electrode active material layer sequentially stacked on the positive electrode current collector, wherein the first positive electrode active material layer and the second positive electrode active material layer include a bimodal positive active material, the first positive electrode active material layer includes small-diameter particles in the form of single particles, and the second positive electrode active material layer includes small-diameter particles in the form of secondary particles. The positive electrode has improved capacity, efficiency, lifespan, output properties, and thermal stability.

    Positive Electrode Optimized for Improving High-Temperature Life Characteristics and Secondary Battery Comprising the Same
    82.
    发明公开
    Positive Electrode Optimized for Improving High-Temperature Life Characteristics and Secondary Battery Comprising the Same 审中-公开

    公开(公告)号：US20230155123A1

    公开(公告)日：2023-05-18

    申请号：US17780642

    申请日：2020-10-20

    Applicant: LG Energy Solution, Ltd.

    Inventor： Sang Wook Lee ,  Gi Beom Han ,  Hakyoon Kim ,  Sora Baek ,  Jungmin Han ,  Wang Mo Jung

    IPC: H01M4/505 ,  H01M4/525

    CPC classification number: H01M4/505 ,  H01M4/525 ,  H01M2004/028

    Abstract: A positive electrode and a secondary battery including the same is disclosed herein. In some embodiments, a positive electrode includes a positive electrode current collector and a positive electrode mixture containing a positive electrode active material disposed thereon, the positive electrode active material includes a lithium transition metal oxide powder represented by chemical formula 1,


    LiaNixCoyMzO2-wAw  (1)



    M is at least one selected from the group consisting of Mn, Ti, Mg, Al, Zr, Mn and Ni, A is an oxygen-substituted halogen, and 1.00≤a≤1.05, 0.1≤x≤0.8, 0.1≤y≤0.8, 0.01≤z≤0.4, and 0≤w≤0.001,
    the powder having large particles which are secondary particles having an average particle diameter (D50) of 7 μm to 17 μm, and small particles which are single particles having average particle diameter (D50) of 2 μm to 7 μm, weight ratio of large particles to small particles is 5:5 to 9:1, and the positive electrode mixture has a porosity of 22% to 35%.

    Sacrificial Positive Electrode Material with Reduced Gas Generation and Method of Preparing Thereof
    83.
    发明申请
    Sacrificial Positive Electrode Material with Reduced Gas Generation and Method of Preparing Thereof 有权

    公开(公告)号：US20230128140A1

    公开(公告)日：2023-04-27

    申请号：US17915607

    申请日：2022-02-09

    Applicant: LG Energy Solution, Ltd.

    Inventor： Tae Gu Yoo ,  Wang Mo Jung ,  Chi Ho Jo ,  Ji Hye Kim ,  Hae Jung Jung ,  Jong Wook Heo

    IPC: H01M4/62

    Abstract: A disclosure sacrificial positive electrode material with reduced gas generation and a method of preparing the same are disclosed herein. In some embodiments, a method includes calcining a mixture of lithium oxide (Li2O) and cobalt oxide (CoO) in an atmosphere containing an inert gas and oxygen gas and having a relative humidity of 20% or less, wherein the oxygen gas is at a partial pressure of 1% or less, to prepare a lithium cobalt metal oxide represented by Chemical Formula (1): LixCo(1-y)MyO4-zAz  [Chemical Formula 1] M is at least one selected from the group consisting of Ti, Al, Zn, Zr, Mn and Ni, A is a halogen, x, y and z are 5≤x≤7, 0≤y≤0.4, and 0≤z≤0.001. A battery having the sacrificial positive electrode material can have reduced gas generation in the electrode assembly at the time of charging the battery, and thus the stability and life of the battery are improved.

    Sacrificial Positive Electrode Material and Lithium Secondary Battery Comprising the Same
    84.
    发明申请
    Sacrificial Positive Electrode Material and Lithium Secondary Battery Comprising the Same 有权

    公开(公告)号：US20230115280A1

    公开(公告)日：2023-04-13

    申请号：US17914928

    申请日：2022-02-10

    Applicant: LG Energy Solution, Ltd.

    Inventor： Tae Gu Yoo ,  Wang Mo Jung ,  Chi Ho Jo ,  Ji Hye Kim ,  Hae Jung Jung ,  Jong Wook Heo

    IPC: H01M4/525 ,  H01M4/505 ,  H01M4/62

    Abstract: A sacrificial positive electrode material, a positive electrode comprising the same, and a lithium secondary battery having the positive electrode are disclosed herein. In some embodiments, a sacrificial positive electrode material includes a lithium cobalt oxide represented by the following Chemical Formula 1, wherein the sacrificial positive electrode active material has a defect formation energy of metal (M) of −4.0 to −8.5 eV, calculated using density functional theory (DFT): LixCo(1-y)MyO4   [Chemical Formula 1] M is at least one selected from the group consisting of Al, Fe, Zn, Ti, W, Mg, Ge and Si, pa x and y are 5≤x≤7 and 0.05≤y≤0.6. When the defect formation energy of the metal is controlled within a specific range, a high initial charging/discharging efficiency is realized during initial charging/discharging, and the amount of gas additionally generated at the later time of charging/discharging is reduced. Thus, stability and the charging/discharging performance of a battery is improved.

    Positive Electrode Material for Secondary Battery and Lithium Secondary Battery Comprising Same
    88.
    发明申请
    Positive Electrode Material for Secondary Battery and Lithium Secondary Battery Comprising Same 有权

    公开(公告)号：US20220336806A1

    公开(公告)日：2022-10-20

    申请号：US17640616

    申请日：2020-09-11

    Applicant: LG Energy Solution, Ltd.

    Inventor： Eun Sol Lho ,  Sang Min Park ,  Sung Bin Park ,  Seul Ki Kim ,  Wen Xiu Wang ,  Wang Mo Jung

    IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/134 ,  H01M4/36

    Abstract: The present invention relates to a positive electrode material for a secondary battery, the positive electrode material including a first positive electrode active material and a second positive electrode active material, the first positive electrode active material and the second positive electrode active material being single particle types and lithium composite transition metal oxides including nickel, cobalt, and manganese and having a nickel content accounting for 60 mol % or more of total metals except for lithium, wherein the first positive electrode active material has a mean particle diameter (D50) of 3 μm or less and a molar ratio (Li/M) of lithium to the metals (M) except for lithium of 1.10 to 1.20, and the second positive electrode active material has a mean particle diameter (D50) of greater than 3 μm and a molar ratio (Li/M) of lithium to the metals (M) except for lithium of 1.00 to 1.13.

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