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    ELECTROCHEMICAL ELEMENT, METHOD FOR MANUFACTURING SAME, AND ELECTROCHEMICAL DEVICE
    4.
    发明申请
    ELECTROCHEMICAL ELEMENT, METHOD FOR MANUFACTURING SAME, AND ELECTROCHEMICAL DEVICE 有权

    公开(公告)号：US20230112969A1

    公开(公告)日：2023-04-13

    申请号：US17796077

    申请日：2020-12-17

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Yoshinori Satou ,  Shuhei Uchida ,  Yuichi Miyoshi ,  Nobuhiko Hojo

    IPC: H01M4/36 ,  H01M4/04 ,  H01M4/48 ,  H01M4/587 ,  H01M4/38 ,  H01M4/40 ,  H01M4/80

    Abstract: An electrochemical element includes a current collector, and an active material layer supported on the current collector, wherein the active material layer includes active material particles, the active material particles each include lithium silicate composite particles each including a lithium silicate phase and silicon particles dispersed in the lithium silicate phase, and a first coating that covers at least a portion of a surface of the lithium silicate composite particles, the first coating includes an oxide of a first element other than a non-metal element, the active material layer has a thickness TA, and T1b > T1t is satisfied, where T1b is a thickness of the first coating that covers the lithium silicate composite particles at a position of 0.25TA from the surface of the current collector in the active material layer, and T1t is a thickness of the first coating that covers the lithium silicate composite particles at a position of 0.75TA from the surface of the current collector in the active material layer.

    NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
    5.
    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.

    Electrolytic solution and battery
    8.
    发明授权
    Electrolytic solution and battery 有权

    公开(公告)号：US10069164B2

    公开(公告)日：2018-09-04

    申请号：US15158592

    申请日：2016-05-19

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Hirotetsu Suzuki ,  Nobuhiko Hojo

    IPC: H01M10/05 ,  H01M10/0565 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569

    Abstract: Provided is an electrolytic solution including a nonaqueous solvent and an alkali metal salt. The alkali metal salt is dissolved in the nonaqueous solvent. The nonaqueous solvent contains a perfluoropolyether. The molecular ends of the perfluoropolyether are each an unsubstituted alkyl ether or an unsubstituted carboxylate. The perfluoropolyether has a repeating unit composed of a perfluoroalkyl chain and an oxygen atom. Also provided is a battery including the electrolytic solution, a positive electrode containing a positive electrode active material that can occlude and release an alkali metal cation, and a negative electrode containing a negative electrode active material that can occlude and release the alkali metal cation.

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