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    NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
    33.
    发明申请
    NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY 有权

    公开(公告)号：US20220416237A1

    公开(公告)日：2022-12-29

    申请号：US17638489

    申请日：2020-07-16

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Akira Kano ,  Shoshi Terada

    IPC: H01M4/525 ,  H01M10/0525 ,  H01M10/0566

    Abstract: A non-aqueous electrolyte secondary battery including a positive electrode, a separator, a negative electrode facing the positive electrode, with the separator interposed; and a liquid electrolyte. The positive electrode includes a composite oxide containing lithium as a first metal, and a second metal other than lithium. In the composite oxide, the second metal contains Ni, a content of Ni in the second metal is 90 at % or more, and a content of Co in the second metal is 10 at % or less. The liquid electrolyte contains at least one cation X selected from the group consisting of Na+, K+, Rb+, Cs+, Fe, Mg2+, Ca2+, Sr2+, Ba2+, and Al3+, and an oxalate complex anion Y.

    NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
    34.
    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
    36.
    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 METAL SECONDARY BATTERY
    37.
    发明申请
    LITHIUM METAL SECONDARY BATTERY 有权

    公开(公告)号：US20220069339A1

    公开(公告)日：2022-03-03

    申请号：US17424778

    申请日：2019-12-04

    Applicant: Panasonic Intellectual Property Management Co., Ltd.

    Inventor： Tomohisa Okazaki ,  Akira Kano

    IPC: H01M10/0525 ,  H01M10/0567 ,  H01M4/134 ,  H01M4/131 ,  H01M4/66 ,  H01M4/38 ,  H01M4/28

    Abstract: A lithium metal secondary battery includes: a positive electrode including a positive electrode active material which contains a lithium transition metal oxide; a negative electrode which is disposed to face the positive electrode, which includes a negative electrode collector, and on which a lithium metal is precipitated in charge; a separator provided between the positive electrode and the negative electrode; and an electrolyte which is impregnated in the separator and which contains a lithium halogenated compound in an amount of more than 0.1 to less than 10 percent by weight and at least one selected from a fluorinated cyclic carbonate and a fluorinated oxalate complex.

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