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    NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
    13.
    发明申请
    NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY 有权

    公开(公告)号：US20220181695A1

    公开(公告)日：2022-06-09

    申请号：US17442360

    申请日：2020-02-17

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Akira Kano ,  Tomohisa Okazaki ,  Ryohei Miyamae

    IPC: H01M10/0569 ,  H01M10/0525

    Abstract: In a non-aqueous electrolyte secondary battery including a positive electrode, a negative electrode, and a non-aqueous electrolyte having lithium-ion conductivity, the solvent in the non-aqueous electrolyte includes a first ether compound represented by a general formula (1): R1-(OCH2CH2)n—OR2 in which R1 and R2 are independently an alkyl group with a carbon number of 1 to 5, and n represents 1 to 3; and a second ether compound having a fluorination rate of 60% or more and represented by a general formula (2): Ca1Mb1Fc1Od1(CF2OCH2)Ca2Hb2Fc2Od2 in which a1≥1, a2≥0, b1≤2a1, b2≤2a2, c1=(2a1+1)−b1, c2=(2a2+1)−b2, d≥0, and d2≥0. The proportion of a total amount of the first ether compound and the second ether compound in the solvent is 80 volume % or more.

    Lithium secondary battery including nonaqueous electrolyte having lithium-ion conductivity
    15.
    发明授权
    Lithium secondary battery including nonaqueous electrolyte having lithium-ion conductivity 有权

    公开(公告)号：US11271252B2

    公开(公告)日：2022-03-08

    申请号：US16383244

    申请日：2019-04-12

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Akira Kano ,  Ryohei Miyamae ,  Kiyohiro Isii ,  Kensuke Nakura

    IPC: H01M10/0587 ,  H01M4/134 ,  H01M4/38 ,  H01M10/052 ,  H01M4/02

    Abstract: A lithium secondary battery includes an electrode group and a nonaqueous electrolyte having lithium ion conductivity. A negative electrode includes a negative electrode current collector. The negative electrode current collector has a first surface facing an outward direction of winding of the electrode group and a second surface facing an inward direction of the winding of the electrode group. Lithium metal is deposited on the first surface and the second surface by charge. The negative electrode further includes first protrusions protruding from the first surface and second protrusions protruding from the second surface. A ratio A1X/A1 is greater than a ratio A2X/A2. A1X is a sum of projected areas of the first protrusions on the first surface. A1 is an area of the first surface. A2X is a sum of projected areas of the second protrusions on the second surface. A2 is an area of the second surface.

    LITHIUM SECONDARY BATTERY
    19.
    发明申请
    LITHIUM SECONDARY BATTERY 有权

    公开(公告)号：US20240429395A1

    公开(公告)日：2024-12-26

    申请号：US18273864

    申请日：2022-01-21

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Ryohei Miyamae ,  Akira Kano ,  Kiyohiro Ishii

    IPC: H01M4/62 ,  H01M4/02 ,  H01M4/36 ,  H01M10/0525

    Abstract: A lithium secondary battery includes a positive electrode that absorbs lithium ions during discharge and releases the lithium ions during charge, a negative electrode at which a lithium metal deposits during charge and from which the lithium metal dissolves during discharge, and a non-aqueous electrolyte having lithium ion conductivity. The surface of the negative electrode is covered with a protective layer. The protective layer includes a block polymer in which a first polymer segment having a repeating structure of a monomer unit A and a second polymer segment having a repeating structure of a monomer unit B are bound together.

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