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    NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
    13.
    发明申请
    NONAQUEOUS ELECTROLYTE SECONDARY BATTERY 审中-公开

    公开(公告)号：US20200020986A1

    公开(公告)日：2020-01-16

    申请号：US16580212

    申请日：2019-09-24

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Yasuko Hirayama ,  Naoya Morisawa ,  Takanobu Chiga ,  Kazuhiro Iida ,  Atsushi Fukui

    IPC: H01M10/0569 ,  H01M10/0568 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0567

    Abstract: A nonaqueous electrolyte secondary battery according to one embodiment of the present disclosure comprises a positive electrode having a positive electrode active substance layer, a negative electrode having a negative electrode active substance layer, and a nonaqueous electrolyte. The nonaqueous electrolyte contains a sulfonylimide salt and a nonaqueous solvent containing a fluorinated chain carboxylic acid ester represented by a general formula. The fluorinated chain carboxylic acid ester content of the nonaqueous solvent is 80 vol % or greater and the sulfonylimide salt content is 2.4 mol or greater with respect to 1 L of the nonaqueous solvent. (In the formula, R1 and R2 are any one of H, F, and CH3-xFx (where x is 1, 2 or 3), and can be the same or different. R3 is a C1-C3 alkyl group and can contain F.)

    LITHIUM ION SECONDARY BATTERY
    14.
    发明公开
    LITHIUM ION SECONDARY BATTERY 审中-公开

    公开(公告)号：US20230318049A1

    公开(公告)日：2023-10-05

    申请号：US18028695

    申请日：2021-08-18

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Hiroyuki Matsumoto ,  Kazuhiro Iida ,  Hideharu Takezawa

    IPC: H01M10/42 ,  H01M10/0525 ,  H01M10/056

    CPC classification number: H01M10/4235 ,  H01M10/0525 ,  H01M10/056 ,  H01M2300/0088

    Abstract: This lithium ion secondary battery comprises a negative electrode, a positive electrode, a non-aqueous electrolyte including a lithium salt, and an aqueous electrolyte including a lithium salt, wherein: among the negative electrode and the positive electrode, the aqueous electrolyte contacts only the positive electrode; among the negative electrode and the positive electrode, the non-aqueous electrolyte contacts at least the negative electrode; the positive electrode contains a positive electrode active material; the positive electrode active material contains a lithium transition metal composite oxide and a surface modification layer formed on the surface of primary particles of the lithium transition metal composite oxide; and the surface modification layer contains an alkali earth metal element.

    SECONDARY BATTERY
    16.
    发明申请
    SECONDARY BATTERY 有权

    公开(公告)号：US20220393170A1

    公开(公告)日：2022-12-08

    申请号：US17763102

    申请日：2020-07-28

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Kazuhiro Iida ,  Masanobu Takeuchi

    IPC: H01M4/587 ,  H01M10/0525 ,  H01M4/133

    Abstract: This secondary battery comprises a positive electrode, a negative electrode, and an electrolyte. The electrolyte contains a solvent containing water, and a lithium salt. The negative electrode has a negative electrode active material that contains a carbon material. In the carbon material, the peak intensity ratio (D/G value) of a D band and a G band in the Raman spectrum obtained using Raman spectroscopy is 0.9 to 1.5. A coating is formed on the surface of the carbon material. In the coating, in the XPS spectrum measured using X-ray photoelectron spectroscopy, when the peak intensity of a 1s electron orbit of an F atom for which the binding energy appears near 685 eV is P1, and the peak intensity of the 1s electron orbit of an O atom for which the binding energy appears near 532 eV is P2, the ratio of the peak intensity P1 to the peak intensity P2 (P1/P2 value) is 0.6 to 3.0.

    SECONDARY BATTERY
    17.
    发明申请
    SECONDARY BATTERY 有权

    公开(公告)号：US20220393169A1

    公开(公告)日：2022-12-08

    申请号：US17763053

    申请日：2020-07-28

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Kazuhiro Iida ,  Masanobu Takeuchi

    IPC: H01M4/587

    Abstract: This secondary battery comprises a positive electrode, a negative electrode, and an electrolyte solution. The electrolyte solution includes a solvent containing water as a main component, and a lithium salt. The negative electrode has a negative electrode active material that includes a carbon material. The Raman spectrum of the carbon material, which is obtained by Raman spectroscopy, indicates that the peak intensity ratio between the D-band and the G-band (D/G) is 0.3 or greater. This secondary battery can suppress the reductive decomposition of the water-based electrolyte solution.

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