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    NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
    2.
    发明申请
    NONAQUEOUS ELECTROLYTE SECONDARY BATTERY 有权

    公开(公告)号：US20220344699A1

    公开(公告)日：2022-10-27

    申请号：US17764716

    申请日：2020-07-21

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Nobuhiko Hojo ,  Yuji Tani

    IPC: H01M10/0525 ,  H01M10/0569 ,  H01M10/0587

    Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a lithium ion conductive nonaqueous electrolyte, wherein the negative electrode contains graphite, an open circuit potential of the negative electrode in a fully charged state is 70 mV or less relative to lithium metal, the nonaqueous electrolyte contains a solvent, a cation, and an anion, the solvent contains a fluorine-containing cyclic carbonic acid ester, the cation includes lithium ions, and the anion includes an oxalate complex anion.

    NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
    3.
    发明申请
    NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY 审中-公开

    公开(公告)号：US20200176818A1

    公开(公告)日：2020-06-04

    申请号：US16639384

    申请日：2018-09-11

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Satoshi Nishitani ,  Yuji Tani ,  Masaki Deguchi

    IPC: H01M10/0568 ,  H01M10/0525 ,  H01M4/131 ,  H01M10/0569 ,  H01M4/485 ,  H01M10/0567

    Abstract: A non-aqueous electrolyte secondary battery, including a positive electrode, a separator, a negative electrode facing the positive electrode with the separator interposed therebetween, and an electrolytic solution including a solvent and an electrolyte. The negative electrode includes a negative electrode material containing a lithium silicate phase and silicon particles dispersed in the lithium silicate phase. The silicon particles are contained in the negative electrode material in an amount of 30 mass % or more, relative to a total mass of the lithium silicate phase and the silicon particles. The electrolytic solution contains an ester compound C of an alcohol compound A and a carboxylic acid compound B, and contains at least one of the alcohol compound A and the carboxylic acid compound B in an amount of 15 ppm or more, relative to a mass of the electrolytic solution.

    NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
    6.
    发明公开
    NONAQUEOUS ELECTROLYTE SECONDARY BATTERY 审中-公开

    公开(公告)号：US20230378438A1

    公开(公告)日：2023-11-23

    申请号：US18027282

    申请日：2021-09-14

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Yuji Tani ,  Yuji Goshima ,  Fumiharu Niina

    IPC: H01M4/36 ,  H01M4/133 ,  H01M4/137

    CPC classification number: H01M4/364 ,  H01M4/133 ,  H01M4/137 ,  H01M2004/027

    Abstract: This nonaqueous electrolyte secondary battery comprises a positive electrode, a negative electrode, and a nonaqueous electrolyte. The negative electrode includes a negative electrode core and a negative electrode mixture layer formed on at least one surface of the negative electrode core. The ratio (E1/E2) of the charging expansion rate (E1) to the discharge expansion rate (E2) of the negative electrode is at least 1.05 and less than 1.15. The content of silicon material with respect to the mass of a negative electrode active material in the negative electrode mixture layer is 3-12 mass %. Graphite, a first silicon material (SiO), and a second silicon material (LSX) are preferably included as the negative electrode active material in the negative electrode mixture layer.

    NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
    7.
    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.

    LITHIUM ION SECONDARY BATTERY
    8.
    发明申请
    LITHIUM ION SECONDARY BATTERY 有权

    公开(公告)号：US20250015338A1

    公开(公告)日：2025-01-09

    申请号：US18711307

    申请日：2022-10-14

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Yuji Tani ,  Yosuke Sato

    IPC: H01M10/0525 ,  H01M4/02 ,  H01M4/133 ,  H01M4/134 ,  H01M4/36 ,  H01M4/38 ,  H01M4/583 ,  H01M4/66

    Abstract: A negative electrode of this lithium ion secondary battery comprises a negative electrode collector and a negative electrode mixture layer that is formed on the surface of the negative electrode collector; the thickness of the negative electrode collector is 4 μm to 12 μm; the 1% proof stress of the negative electrode collector is 300 MPa to 700 MPa; the negative electrode mixture laver contains a carbon-based material and a silicon-based material, which serve as negative electrode active materials; the discharge capacity of the negative electrode active materials is 400 mAh/g to 750 mAh/g the carbon-based material contains a carbon-based material A and a carbon-based material B, which have different particle fracture strengths from each other; the particle fracture strength of the carbon-based material A is 5 MPa to 15 MPa; and the particle fracture strength of the carbon-based material B is 25 MPa to 40 MPa.

    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 审中-公开

    公开(公告)号：US20200176771A1

    公开(公告)日：2020-06-04

    申请号：US16639377

    申请日：2018-09-11

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Yuji Tani ,  Satoshi Nishitani ,  Masaki Deguchi

    IPC: H01M4/525 ,  H01M10/0569 ,  H01M10/052 ,  H01M10/0567 ,  H01M4/02

    Abstract: A non-aqueous electrolyte secondary battery including a positive electrode, a separator, a negative electrode facing the positive electrode with the separator interposed therebetween, and an electrolytic solution containing a solvent and an electrolyte. The positive electrode includes a positive electrode material containing a lithium-nickel composite oxide represented by LiaNibM1−bO2, where M represents at least one selected from the group consisting of Na, Mg, Sc, Y, Mn, Fe, Co, Ni, Cu, Zn, Al, Cr, Pb, Sb and B, 0.95≤a≤1.2, and 0.8≤b≤1. The electrolytic solution contains an ester compound C of an alcohol compound A and a carboxylic acid compound B, and contains at least one of the alcohol compound A and the carboxylic acid compound B in an amount of 15 ppm or more, relative to a mass of the electrolytic solution.

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