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    Separator for Lithium Secondary Battery and Lithium Secondary Battery Including the Same
    1.
    发明公开
    Separator for Lithium Secondary Battery and Lithium Secondary Battery Including the Same 审中-公开

    公开(公告)号：US20230223659A1

    公开(公告)日：2023-07-13

    申请号：US18008801

    申请日：2022-01-25

    申请人： LG Chem, Ltd.

    发明人： Joo-Sung Lee ,  Bi-Oh Ryu ,  Kil-An Jung

    IPC分类号： H01M50/491 ,  H01M10/0525

    CPC分类号： H01M50/491 ,  H01M10/0525

    摘要： Provided is a separator having excellent safety and a lithium secondary battery including the same. The separator includes: a porous polymer substrate; and an organic/inorganic composite porous layer disposed on at least one surface of the porous polymer substrate and including inorganic particles and a binder polymer, wherein the inorganic particles have a BET specific surface area of 50-150 m2/g, the organic/inorganic composite porous layer has a thickness larger than the thickness of the porous polymer substrate, and the surface of the organic/inorganic composite porous layer has an arithmetic mean roughness of 100-500 nm.

    Cross-Linked Polyolefin Separator and Manufacturing Method Therefor
    5.
    发明申请
    Cross-Linked Polyolefin Separator and Manufacturing Method Therefor 有权

    公开(公告)号：US20210125792A1

    公开(公告)日：2021-04-29

    申请号：US17044026

    申请日：2019-11-29

    申请人： LG Chem, Ltd.

    发明人： Bi-Oh Ryu ,  Joo-Sung Lee ,  Won-Sik Bae

    IPC分类号： H01G11/52 ,  C08J3/24 ,  C08F8/42 ,  B29C48/91

    摘要： A crosslinked polyolefin separator and a method of making the same are disclosed herein. In some embodiments, a crosslinked polyolefin separator includes inorganic particles and a crosslinked polyolefin having Si—O—Si crosslinking bonds, wherein the inorganic particles are chemically bound to silicon (Si) atoms of the Si—O—Si crosslinking bonds by oxygen (O) atoms. The crosslinked polyolefin separator has low resistance, high air permeability and improved heat resistance.

    Crosslinked Polyolefin Separator and Manufacturing Method Therefor
    6.
    发明申请
    Crosslinked Polyolefin Separator and Manufacturing Method Therefor 审中-公开

    公开(公告)号：US20200220139A1

    公开(公告)日：2020-07-09

    申请号：US16648562

    申请日：2019-07-26

    申请人： LG Chem, Ltd.

    发明人： Joo-Sung Lee ,  Bi-Oh Ryu ,  Won-Sik Bae ,  A-Young Lee ,  Heon-Sik Song

    IPC分类号： H01M2/16 ,  H01M2/14 ,  C08J7/16

    摘要： A crosslinked polyolefin separator which has gels with a longer side length of 50 μm or more in a number ranging from 0 to 3 per 1 m2 of the separator, and shows a standard deviation of absorbance ratio between the center of the separator and the side thereof ranging from 0.01 to 0.5 is provided. A method for manufacturing the crosslinked polyolefin separator is also provided. The method includes (S1) preparing a polyolefin porous membranes, and (S2) applying a coating solution containing an initiator and alkoxy group-containing vinylsilane onto at least one surface of the porous membrane. The coating solution can permeate even to the inside of exposed pores. Thus, it is possible to provide a crosslinked polyolefin separator in which silane crosslinking occurs uniformly even inside of the pores.

    Cross-linked polyolefin separator and manufacturing method for same
    7.
    发明授权
    Cross-linked polyolefin separator and manufacturing method for same 有权

    公开(公告)号：US11355814B2

    公开(公告)日：2022-06-07

    申请号：US16755444

    申请日：2019-06-11

    申请人： LG Chem, Ltd.

    发明人： Joo-Sung Lee ,  Won-Sik Bae ,  Bi-Oh Ryu ,  Heon-Sik Song

    IPC分类号： H01M50/417 ,  C08K5/01 ,  H01M50/411 ,  H01M50/403 ,  H01M10/052 ,  H01M50/40

    摘要： A method for manufacturing a crosslinked polyolefin separator, including the steps of: (S1) introducing polyolefin having a weight average molecular weight of 200,000-1,000,000, a first diluting agent, alkoxysilane containing a carbon-carbon double bonded group, an initiator and a crosslinking catalyst to an extruder; (S2) introducing a second diluting agent to the extruder, followed by mixing, to carry out reactive extrusion of a silane-grafted polyolefin composition; (S3) molding and orienting the reactive extruded silane-grafted polyolefin composition in a form of a sheet; (S4) extracting the first diluting agent and the second diluting agent from the oriented sheet to obtain a silane-grafted polyolefin porous membrane; (S5) thermally fixing the porous membrane; and (S6) crosslinking the porous membrane in the presence of water and a crosslinked polyolefin separator are provided. According to the method, it is possible to provide a separator which shows a decrease in intensive silane crosslinking on the surface thereof.

    Separator for Electrochemical Device and Method for Manufacturing the Same
    9.
    发明申请
    Separator for Electrochemical Device and Method for Manufacturing the Same 有权

    公开(公告)号：US20210036287A1

    公开(公告)日：2021-02-04

    申请号：US16964375

    申请日：2019-09-16

    申请人： LG Chem, Ltd.

    发明人： A-Young Lee ,  Joo-Sung Lee ,  Won-Sik Bae ,  Bi-Oh Ryu

    IPC分类号： H01M2/16 ,  H01M4/62 ,  H01M2/14

    摘要： A separator for an electrochemical device is provided. The separator comprises a porous substrate having a plurality of pores, and a porous coating layer positioned on at least one surface of the porous substrate, the porous coating layer including a plurality of inorganic particles and a binder polymer positioned on a whole or a part of the surface of the inorganic particles to connect the inorganic particles with one another and fix the inorganic particles, wherein the binder polymer comprises a first binder polymer and a second binder polymer. The first binder polymer has an electrolyte uptake of 80-165%, and the second binder polymer has an electrolyte uptake of 20-40%. An electrochemical device including the separator is also disclosed.