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    POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY AND LITHIUM ION SECONDARY BATTERY
    21.
    发明申请
    POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY AND LITHIUM ION SECONDARY BATTERY 有权

    公开(公告)号：US20220344656A1

    公开(公告)日：2022-10-27

    申请号：US17761892

    申请日：2020-09-18

    Applicant: SUMITOMO METAL MINING CO., LTD.

    Inventor： Tetsutaro Hayashi ,  Shun Kai Bong ,  Shinsuke Suganuma ,  Toshihiro Kato

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

    Abstract: To provide a positive electrode active material capable of further reducing positive electrode resistance and exhibiting better output characteristics.
    A positive electrode active material includes a coating layer formed of a metal composite oxide of Li and one or more metal elements selected from Al, Ti, Zr, Nb, Mo, and W on at least a part of a surface of lithium transition metal-containing composite oxide particles, and has d50 of 3.0 to 7.0 μm, a BET specific surface area of 2.0 to 5.0 m2/g, a tap density of 1.0 to 2.0 g/cm3, and an oil absorption amount of 30 to 60 ml/100 g, in which the amount of metal elements other than Li contained in the coating layer is 0.1 to 1.5 atom % with respect to the total number of atoms of Ni, Mn, and Co contained in the composite oxide particles.

    POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM-ION SECONDARY BATTERIES, METHOD FOR PRODUCING SAME, AND LITHIUM-ION SECONDARY BATTERY
    22.
    发明申请
    POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM-ION SECONDARY BATTERIES, METHOD FOR PRODUCING SAME, AND LITHIUM-ION SECONDARY BATTERY 有权

    公开(公告)号：US20220271272A1

    公开(公告)日：2022-08-25

    申请号：US17622485

    申请日：2020-06-08

    Applicant: SUMITOMO METAL MINING CO., LTD.

    Inventor： Toshihiro Kato ,  Tetsutaro Hayashi ,  Willy Shun Kai Bong

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

    Abstract: The method includes: a dry mixing process of mixing a tungsten compound with a lithium nickel manganese cobalt-containing composite oxide that is a base material to obtain a mixture; a water spray mixing process of spraying water to the mixture while the mixture is stirred, to mix the mixture; a heat treatment process of subjecting the mixture obtained after the water spray mixing process to a heat treatment at a temperature of 500° C. or lower; and a drying process of drying the mixture obtained after the heat treatment process at a temperature of 500° C. or lower to obtain a W- and Li-containing compound-coated lithium nickel manganese cobalt-containing composite oxide in which fine particles and coating films of a W- and Li-containing compound exist on a surface of the primary particles, and in at least drying process, the drying is performed using a vacuum dry mixing apparatus in a vacuum atmosphere.

    Positive electrode material
    23.
    发明授权
    Positive electrode material 有权

    公开(公告)号：US11374210B2

    公开(公告)日：2022-06-28

    申请号：US16410381

    申请日：2019-05-13

    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  SUMITOMO METAL MINING CO., LTD.

    Inventor： Ryuta Sugiura ,  Taira Aida ,  Tetsutaro Hayashi ,  Satoshi Kanada

    IPC: H01M4/13 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/02

    Abstract: Provided is a positive electrode material that allows reducing battery resistance. The positive electrode material disclosed herein has particles of a positive electrode active material, each having a void communicating between the surface and at least the interior; and an electronic conductor present on the surface of the particles of the positive electrode active material. The positive electrode active material has a layered rock salt structure, and has a composition represented by Formula (I) below. The electronic conductor has a composition represented by Formula (II) below, Li1+uNixMnyCozMtO2  (I) La1−pMapCo1−qMbqO3−δ  (II) wherein the symbols in the formulas are as defined in the specification.

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