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    Lithium secondary battery
    1.
    发明授权
    Lithium secondary battery 有权

    公开(公告)号：US11367901B2

    公开(公告)日：2022-06-21

    申请号：US16375903

    申请日：2019-04-05

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Junichi Sakamoto ,  Akira Kano

    IPC: H01M10/00 ,  H01M10/0568 ,  H01M10/052 ,  H01M10/0567 ,  H01M10/0569

    Abstract: A lithium secondary battery according to the present disclosure comprises a cathode, an anode; and a non-aqueous electrolyte having lithium ion conductivity. A lithium metal is precipitated on a surface of the anode during charge of the lithium secondary battery. The lithium metal is dissolved from the surface of the anode in the non-aqueous electrolyte during discharge of the lithium secondary battery. The non-aqueous electrolyte contains a solvent and a lithium salt. The lithium salt includes a first lithium salt and a second lithium salt. The second lithium salt is different from the first lithium salt. The first lithium salt is composed of a lithium ion and an ate complex anion. A sum of concentration of the first lithium salt and the second lithium salt which are contained in the non-aqueous electrolyte is not less than 3.0 mol/L.

    NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
    4.
    发明申请
    NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY 有权

    公开(公告)号：US20220173381A1

    公开(公告)日：2022-06-02

    申请号：US17441527

    申请日：2020-02-17

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Junichi Sakamoto ,  Yuji Tani ,  Nobuhiko Hojo

    IPC: H01M4/36 ,  H01M4/587 ,  H01M4/38 ,  H01M10/0525

    Abstract: A non-aqueous electrolyte secondary battery with a negative electrode active material including a carbon material, and a silicon-containing material in which Si particles are dispersed in a lithium ion conductive phase. The negative electrode material mixture layer having a thickness T0 includes a first region on the negative electrode surface side having a thickness of T1, and a second region on the negative electrode current collector side, and the ratio T1/T0 is 1/20 to 19/20. The ratio of a mass ratio MS1 of the silicon-containing material in the first region to a mass ratio MS2 of the silicon-containing material in the second region is not less than 0 and less than 1. An open circuit potential of the negative electrode in a fully charged condition is higher than 0 mV and 70 mV or lower relative to lithium metal.

    NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
    9.
    发明申请
    NONAQUEOUS ELECTROLYTE SECONDARY BATTERY 有权

    公开(公告)号：US20220173389A1

    公开(公告)日：2022-06-02

    申请号：US17442058

    申请日：2020-03-23

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Yuji Tani ,  Junichi Sakamoto ,  Nobuhiko Hojo

    IPC: H01M4/38 ,  H01M4/134 ,  H01M4/133 ,  H01M4/36 ,  H01M10/0525

    Abstract: A non-aqueous electrolyte secondary battery, wherein a negative electrode includes a negative electrode mixture layer having a thickness T and a negative electrode current collector, the negative electrode active material includes carbon and Si-containing materials, wherein when the negative electrode mixture layer is divided into a first region having a thickness of T/2 on the surface side of the negative electrode and a second region having a thickness of T/2 on the negative electrode collector side, a mass ratio of the first to the second composite material contained in the first region is >1, a mass ratio of the first composite to the second composite material contained in the second region is

    NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
    10.
    发明申请
    NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY 有权

    公开(公告)号：US20220069307A1

    公开(公告)日：2022-03-03

    申请号：US17415062

    申请日：2019-12-11

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Chisaki Fujitomo ,  Satoshi Nishitani ,  Junichi Sakamoto ,  Masaki Deguchi

    IPC: H01M4/58 ,  H01M10/0569 ,  H01M4/38

    Abstract: A non-aqueous electrolyte secondary battery including a positive electrode, a negative electrode, and a non-aqueous electrolyte. The negative electrode includes a negative electrode active material capable of electrochemically absorbing and releasing lithium, the negative electrode active material includes a composite material containing a silicate phase and silicon particles dispersed in the silicate phase, and the silicate phase includes at least one of an alkali metal and an alkaline earth metal. The content of the silicon particles in the composite material is above 40 mass % and 80 mass % or less. The non-aqueous electrolyte includes a sultone compound, and the content of the sultone compound in the non-aqueous electrolyte is 2 mass % or less.

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