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    Method of preparing secondary battery
    1.
    发明授权
    Method of preparing secondary battery 有权

    公开(公告)号：US11367905B2

    公开(公告)日：2022-06-21

    申请号：US15740920

    申请日：2017-03-30

    Applicant: LG Chem, Ltd.

    Inventor： Sung Hoon Yu

    IPC: H01M10/058 ,  H01M10/052 ,  H01M10/0569 ,  H01M50/44 ,  H01M50/46 ,  H01M50/411 ,  H01M50/449 ,  H01M4/04 ,  H01M4/505 ,  H01M4/525 ,  H01M4/64 ,  H01M10/04 ,  H01M4/02

    Abstract: The present invention relates to a method of preparing a secondary battery which includes providing a film layer, which includes a first solvent having a melting temperature of 25° C. or more and a viscosity of 1.5 cP or more, between a separator and an electrode (step 1), preparing an electrode assembly by using the electrode, the film layer, and the separator (step 2), and accommodating the electrode assembly in a case, injecting an injection solution including a second solvent, and sealing the case (step 3), and a secondary battery prepared by the method. According to the method of preparing a secondary battery of the preset invention, since electrolyte solution impregnability may be improved, performance and safety of the secondary battery may be further improved.

    Method for activating secondary battery
    7.
    发明授权
    Method for activating secondary battery 有权

    公开(公告)号：US11876191B2

    公开(公告)日：2024-01-16

    申请号：US17055814

    申请日：2019-11-15

    Applicant: LG CHEM, LTD.

    Inventor： In Young Cha ,  Joon Sung Bae ,  Sung Hoon Yu ,  Seung Youn Choi ,  Gyu Ok Hwang

    IPC: H01M10/44 ,  H01M10/04

    CPC classification number: H01M10/443 ,  H01M10/04

    Abstract: The present invention relates to a method for activating a secondary battery. The present invention comprises: a primary charging step of charging a secondary battery including a positive electrode, a negative electrode, a separator, and an electrolyte; a room temperature-aging step of storing, at a room temperature, the secondary battery that has undergone the primary charging step; and a high temperature-aging step of storing, at a high temperature, the secondary battery that has undergone the room temperature-aging step, wherein charging/discharging is performed by alternately applying + current and − current to the secondary battery at the end of the primary charging step. The method for activating a secondary battery according to the present invention includes alternately applying + current and − current to the secondary battery at the end of the primary charging step to stabilize an SEI film, thereby shortening a following-up aging time.

    Non-aqueous electrolyte solution for lithium secondary battery and lithium secondary battery including the same
    10.
    发明授权
    Non-aqueous electrolyte solution for lithium secondary battery and lithium secondary battery including the same 有权

    公开(公告)号：US11183711B2

    公开(公告)日：2021-11-23

    申请号：US16606852

    申请日：2018-09-20

    Applicant: LG Chem, Ltd.

    Inventor： Sung Hoon Yu ,  Chul Haeng Lee ,  Hyun Seung Kim

    IPC: H01M10/0567 ,  H01M10/052 ,  H01M10/0525

    Abstract: A non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same are disclosed herein. In an embodiment, the electrolyte solution includes a lithium salt, an organic solvent, a compound represented by Formula 1 as a first additive, lithium difluorophosphate (LiDFP) as a second additive, wherein the first additive and the second additive are each independently included in an amount of 0.01 wt % to 8.5 wt % based on a total amount of the non-aqueous electrolyte solution. The first additive has metal ion adsorbability and is capable of forming a stable ion conductive film on the surface of an electrode, and a lithium secondary battery in which an abnormal voltage drop phenomenon is improved by including the same.

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