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    Methods for preparing positive electrode material for rechargeable lithium ion batteries
    1.
    发明授权
    Methods for preparing positive electrode material for rechargeable lithium ion batteries 有权

    公开(公告)号：US12255326B2

    公开(公告)日：2025-03-18

    申请号：US17041022

    申请日：2019-03-13

    Applicant: UMICORE ,  UMICORE KOREA LTD.

    Inventor： Jens Paulsen ,  Shinichi Kumakura ,  TaeHyeon Yang ,  Dae-Hyun Kim ,  HyeJeong Yang

    IPC: H01M4/525 ,  H01M4/04 ,  H01M4/505 ,  H01M4/02

    Abstract: A method for preparing a powderous positive electrode material comprising single crystal monolithic particles and having a general formula
    Li1+a((Niz(Ni1/2Mn1/2)yCox)1-k Ak)1-aO2, wherein A is a dopant, −0.03≤a≤0.06, 0.05≤x≤0.35, 0.10≤z≤0.95, x+y+z=1 and k≤0.05 is described. The method comprises providing a mixture comprising a Ni- and Co- bearing precursor and a Li bearing precursor, subjecting the mixture to a multiple step sintering process whereby in the final sintering step a sintered lithiated intermediate material is obtained comprising agglomerated primary particles having a primary particle size distribution with a D50 between 2.0 and 8.0 μm, subjecting the lithiated intermediate material to a wet ball milling step to deagglomerate the agglomerated primary particles and obtain a slurry comprising deagglomerated primary particles, separating the deagglomerated primary particles from the slurry, and heat treating the deagglomerated primary particles at a temperature between 300° C. and at least 20° C. below the temperature in the final sintering step.

    LITHIUM NICKEL MANGANESE COBALT COMPOSITE OXIDE AS A POSITIVE ELECTRODE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM ION BATTERIES
    8.
    发明申请
    LITHIUM NICKEL MANGANESE COBALT COMPOSITE OXIDE AS A POSITIVE ELECTRODE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM ION BATTERIES 有权

    公开(公告)号：US20220271328A1

    公开(公告)日：2022-08-25

    申请号：US17623720

    申请日：2020-07-02

    Applicant: UMICORE ,  UMICORE KOREA LTD.

    Inventor： Maxime BLANGERO ,  KyungSub JUNG ,  Bin-Na YUN ,  Olesia KARAKULINA

    IPC: H01M10/0525 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58 ,  H01M4/131

    Abstract: A positive electrode active material powder suitable for lithium-ion batteries, comprising lithium transition metal-based oxide particles, said particles comprising a core and a surface layer, said surface layer being on top of said core, said particles comprising the elements: Li, M′ and oxygen, wherein M′ has a formula: M′=NizMnyCoxAk, wherein A is a dopant, 0.60≤z≤0.90, 0.05≤y≤0.20, 0.05≤x≤0.20, x+y+z+k=1, and k≥0.01, said positive electrode active material powder having a median particle size D50 ranging from 5 μm to 15 μm, a span ranging from 0.25 to 0.90, and a surface layer thickness ranging from 10 nm to 200 nm, said surface layer comprising: sulfur in a content superior or equal to 0.150 wt % and inferior or equal to 0.375 wt % with respect to the total weight of the positive electrode active material powder, and sulfate ion (SO42−) in a content superior or equal to 4500 ppm and inferior or equal to 11250 ppm.

    Positive electrode materials having a superior hardness strength
    9.
    发明授权
    Positive electrode materials having a superior hardness strength 有权

    公开(公告)号：US11335907B2

    公开(公告)日：2022-05-17

    申请号：US17019626

    申请日：2020-09-14

    Applicant: Umicore ,  Umicore Korea Ltd.

    Inventor： Maxime Blangero ,  Da-In Choi ,  WooRam Cho ,  JiHye Kim

    IPC: H01M4/525 ,  H01M4/505 ,  C01G53/00 ,  H01M10/0525 ,  H01M4/1391 ,  H01M10/052 ,  H01M4/131 ,  H01M4/02

    Abstract: A powderous positive electrode material for a lithium secondary battery has the general formula Li1+x[Ni1−a−b−cMaM′bM″c]1−xO2−z. M is one or more elements of the group Mn, Zr and Ti. M′ is one or more elements of the group Al, B and Co. M″ is a dopant different from M and M′, and x, a, b and c are expressed in mol with −0.02≤x≤0.02, 0≤c≤0.05, 0.10≤(a+b)≤0.65 and 0≤z≤0.05. The material has an unconstrained cumulative volume particle size distribution value (Γ0(D10P=0)), a cumulative volume particle size distribution value after having been pressed at a pressure of 200 MPa (ΓP(D10P=200)) and a cumulative volume particle size distribution value after having been pressed at a pressure of 300 MPa (ΓP(D10P=300)). When ΓP(D10P=200) is compared to Γ0(D10P=0), the relative increase in value is less than 100%. When ΓP(D10P=300) is compared to Γ0(D10P=0), the relative increase in value is less than 120%.

    RECHARGEABLE LITHIUM ION BATTERY WITH IMPROVED LIFE CHARACTERISTICS
    10.
    发明申请
    RECHARGEABLE LITHIUM ION BATTERY WITH IMPROVED LIFE CHARACTERISTICS 有权

    公开(公告)号：US20210320354A1

    公开(公告)日：2021-10-14

    申请号：US17259662

    申请日：2019-07-10

    Applicant: UMICORE ,  UMICORE KOREA LTD.

    Inventor： Liang ZHU ,  Jeong-Rae KIM ,  AReum PARK ,  YuRi LEE

    IPC: H01M50/103 ,  H01M50/136 ,  H01M4/525 ,  H01M10/0525

    Abstract: A secondary Li-ion battery comprising a casing comprising as battery parts: a positive electrode comprising a powderous positive electrode active material, a negative electrode, a separator, and an electrolyte, wherein the casing is provided with means for maintaining the exterior form of the casing, and wherein the positive electrode active material has the general formula Li1+a(NixCoyMz)1−aO2, wherein M=M′1−bAb, M′ being either one or both of Al and Mg, and A being a dopant with b≤0.10, and wherein −0.03≤a≤0.03, 0.80≤×≤0.95, 0.05≤y≤0.20, z≤0.10, with x+y+z=1, and wherein the positive electrode active material has a crystallite size ≤43 nm as determined by the Sherrer equation based on the peak of the (104) plane obtained from the X-ray diffraction pattern using a Cu Kα radiation source, and wherein the positive electrode active material further comprises between 0.4 and 0.6 wt % LiOH.

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