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    SECONDARY BATTERY
    2.
    发明申请
    SECONDARY BATTERY 有权

    公开(公告)号：US20240396019A1

    公开(公告)日：2024-11-28

    申请号：US18695544

    申请日：2022-09-13

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Yosuke Sato ,  Keita Okazaki ,  Yukiho Okuno

    IPC: H01M4/36 ,  H01M4/02 ,  H01M4/38 ,  H01M4/48 ,  H01M4/587

    Abstract: A secondary battery disclosed herein includes a positive electrode, and a negative electrode containing a negative electrode active material. The negative electrode active material contains a carbon material and a silicon-containing material. The silicon-containing material includes a first silicon-containing material and a second silicon-containing material. The average particle diameter of the first silicon-containing material and the average particle diameter of the second silicon-containing material are each smaller than the average particle diameter of the carbon material. The average circularity Zc of the carbon material, the average circularity Zs1 of the first silicon-containing material, and the average circularity Zs2 of the second silicon-containing material satisfy Zs1

    LITHIUM ION SECONDARY BATTERY
    3.
    发明申请
    LITHIUM ION SECONDARY BATTERY 有权

    公开(公告)号：US20240396015A1

    公开(公告)日：2024-11-28

    申请号：US18692502

    申请日：2022-08-22

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Takashi Tsukasaki ,  Yosuke Sato

    IPC: H01M4/36 ,  H01M4/02 ,  H01M4/38 ,  H01M4/583 ,  H01M4/62 ,  H01M4/66 ,  H01M10/0525

    Abstract: Provided is a high-capacity, long-life lithium-ion secondary battery. A lithium ion secondary battery that is an example of an embodiment comprises a positive electrode, a negative electrode, a separator that separates the positive electrode and the negative electrode from each other, and an electrolyte, wherein the negative electrode has a negative electrode collector and a negative electrode mixture layer formed on the surface of the negative electrode collector, the negative electrode mixture layer includes a negative electrode active material having a discharge capacity of 400-750 mAh/g and a conductive agent, the negative electrode active material includes a carbon-based material and a silicon-based material, the negative electrode current collector has a thickness of 4-12 μm, the negative electrode current collector has a 1% yield strength of 300-700 MPa, and the conductive agent includes carbon nanotubes.

    LITHIUM-ION SECONDARY BATTERY
    6.
    发明申请
    LITHIUM-ION SECONDARY BATTERY 有权

    公开(公告)号：US20240396171A1

    公开(公告)日：2024-11-28

    申请号：US18693756

    申请日：2022-08-19

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Takuya Iwamoto ,  Yosuke Sato

    IPC: H01M50/457 ,  H01M4/38 ,  H01M4/587 ,  H01M4/66 ,  H01M10/052 ,  H01M10/0587 ,  H01M50/42 ,  H01M50/451 ,  H01M50/491

    Abstract: The lithium-ion secondary battery comprises a positive electrode, a negative electrode, a separator, and an electrolyte. The negative electrode has a negative electrode current collector, and a negative electrode mixture layer formed on a surface of the negative electrode current collector. The negative electrode mixture layer includes a carbon-based material and a silicon-based material as a negative electrode active material. The discharge capacity of the negative electrode active material is 400-750 mAh/g. The thickness of the negative electrode current collector is 4-12 μm, and the 1% offset yield strength of the negative electrode current collector is 300-700 MPa. The separator has a base material layer, a filler layer formed on a surface of the base material layer, and a resin layer formed on a surface of the base material layer or the filler layer. The porosity of the resin layer is 30-80%.

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