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    ELECTRODE TREATMENT METHOD
    1.
    发明申请
    ELECTRODE TREATMENT METHOD 有权

    公开(公告)号：US20210257605A1

    公开(公告)日：2021-08-19

    申请号：US16973533

    申请日：2019-02-21

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Hiroshi Minami ,  Shigeru Hanaoka

    IPC: H01M4/04 ,  H01M10/54

    Abstract: Provided is an electrode treatment method comprising a peeling step that involves grinding, with a grinding means, an electrode in which an electrode mixture is held on a collector, and peeling the electrode mixture from the collector, the electrode treatment method characterized in that the grinding means has a first member (3) that has a grinding surface and a second member (4) that has a grinding surface, and the first member (3) and the second member (4) are disposed so that the grinding surfaces of the first member (3) and the second member (4) face each other and a space for grinding the electrode is formed between the members, and at least one among the first member (3) and the second member (4) is a grinder that rotates around the direction in which the grinding surfaces face each other and which serves as the rotational axial direction.

    NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR PRODUCING SAME
    2.
    发明申请
    NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR PRODUCING SAME 有权

    公开(公告)号：US20210159536A1

    公开(公告)日：2021-05-27

    申请号：US16640159

    申请日：2018-10-10

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Tomohiro Harada ,  Hiroshi Minami

    IPC: H01M10/052 ,  H01M4/38 ,  H01M4/485 ,  H01M4/66 ,  H01M10/0587 ,  H01M4/04

    Abstract: The nonaqueous electrolyte secondary battery comprises the following: a positive electrode including a positive electrode active material that includes a lithium-containing transition metal oxide, a negative electrode including a negative electrode current collector wherein lithium metal deposits on the negative electrode current collector during charging, a separator disposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The molar ratio of the total amount of lithium held by the positive electrode and the negative electrode to the amount of transition metal in the positive electrode is not more than 1.1. In addition, in the discharged state, a space layer is present between the negative electrode and the separator, and the positive electrode capacity per unit area, α (mAh/cm2), of the positive electrode and the average in thickness, X (μm), of the space layer 50 satisfy 0.055≤α/X≤0.2.

    Electrode treatment method
    3.
    发明授权
    Electrode treatment method 有权

    公开(公告)号：US11949088B2

    公开(公告)日：2024-04-02

    申请号：US16973533

    申请日：2019-02-21

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Hiroshi Minami ,  Shigeru Hanaoka

    IPC: H01M4/04 ,  H01M10/54

    CPC classification number: H01M4/0435 ,  H01M10/54

    Abstract: Provided is an electrode treat rent method comprising a peeling step that involves grind ng, with a grinding means, an electrode in which an electrode mixture is held on a collector, and peeling the electrode mixture from the collector, the electrode treatment method Characterized in that the grinding means has a first member (3) that has a grinding surface and a second member (4) that has a grinding surface, and the first member (3) and the second member (4) are disposed so that the grinding surfaces of the first member (3) and the second member (4) face each other and a space for grinding the electrode is formed between the members, and at least one among the first member (3) and the second member (4) is a grinder that rotates around the direction in which the grinding surfaces face each other and which serves as the rotational axial direction.

    Non-aqueous electrolyte secondary cell
    4.
    发明授权
    Non-aqueous electrolyte secondary cell 有权

    公开(公告)号：US11616228B2

    公开(公告)日：2023-03-28

    申请号：US16640223

    申请日：2018-10-10

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Tomohiro Harada ,  Hiroshi Minami

    IPC: H01M4/485 ,  H01M4/525 ,  H01M4/131 ,  H01M4/134 ,  H01M4/66 ,  H01M10/0525 ,  H01M10/0587 ,  H01M50/107 ,  H01M4/02

    Abstract: The non-aqueous electrolyte secondary cell according to the present invention comprises: an electrode body constituted by a positive electrode including a positive electrode active material comprising a lithium-containing transition metal oxide, a negative electrode including a negative electrode current collector onto which metallic lithium is deposited during charging, and a separator disposed between the positive electrode and the negative electrode; and a non-aqueous electrolyte. The molar ratio of the total lithium content of the positive electrode and the negative electrode to the transition metal content of the positive electrode is 1.1 or less. During discharging, the positive electrode capacitance α(mAh) of the positive electrode and the volume X (mm3) of a hollow constituted by a space formed in the center of the electrode body 14 satisfy the relationship 0.5≤X/α≤4.0.

    LITHIUM ION BATTERY
    8.
    发明申请
    LITHIUM ION BATTERY 审中-公开

    公开(公告)号：US20200350591A1

    公开(公告)日：2020-11-05

    申请号：US16767774

    申请日：2018-10-26

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Yohei Uchiyama ,  Taisuke Yamamoto ,  Tatsuya Akira ,  Norihisa Yamamoto ,  Hiroshi Minami

    IPC: H01M4/66 ,  H01M4/583 ,  H01M4/62 ,  H01M4/131 ,  H01M4/38 ,  H01M10/0525

    Abstract: A lithium battery including a negative electrode having a negative electrode active material layer that contains lithium silicate particles and a binder. The lithium silicate particles include composite particles including a lithium silicate phase and silicon particles dispersed in the lithium silicate phase, wherein a carbon material is present inside the composite particles, and an area ratio of the carbon material occupying a cross section of the composite particles is 0.008 to 6%. The binder includes at least a first resin, wherein the first resin is at least cue selected from the group consisting of polyacrylic acid, a polyacrylic acid salt, and their derivatives. The first resin is contained in an amount of 2 mass % or less in the negative electrode active material layer.

    NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
    9.
    发明申请
    NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY 审中-公开

    公开(公告)号：US20200091500A1

    公开(公告)日：2020-03-19

    申请号：US16471944

    申请日：2017-12-20

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Satoshi Nishitani ,  Hiroshi Minami ,  Masaki Deguchi

    IPC: H01M4/131 ,  H01M4/134 ,  H01M4/38 ,  H01M4/485 ,  H01M4/62 ,  H01M4/36 ,  H01M4/587 ,  H01M4/133 ,  H01M10/0567 ,  H01M10/0525

    Abstract: A positive electrode, a negative electrode, and a non-aqueous electrolyte. The negative electrode includes a negative electrode material, a binder, and a thickener, and the negative electrode material includes a lithium silicate phase, and Si particles dispersed in the lithium silicate phase. The ratio of the Si particles in the negative electrode material is 30 mass % or more. The binder includes a poly(meth)acrylic acid, the thickener includes a carboxyalkyl cellulose, and the amount of the poly(meth)acrylic acid relative to 100 parts by mass of the negative electrode material is 0.1 parts by mass or more and 5 parts by mass or less. The non-aqueous electrolyte includes a lithium salt, a non-aqueous solvent, and an acid that exhibits a pKa of 1 to 30 in water at 25° C. The non-aqueous electrolyte secondary battery can suppress the generation of gas during high-temperature storage, and secure excellent cycle characteristics.

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