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14 条记录 (耗时 0.013 秒)

    Method for analyzing cohesive failure of electrode
    5.
    发明授权
    Method for analyzing cohesive failure of electrode 有权

    公开(公告)号：US11552288B2

    公开(公告)日：2023-01-10

    申请号：US16995976

    申请日：2020-08-18

    申请人： LG CHEM, LTD.

    发明人： In Young Song ,  Joo Yul Baek ,  Jeong Kyu Lee ,  Sung Joon Oh ,  Jong Chan Lee

    IPC分类号： H01M10/42 ,  H01M4/36 ,  H01M4/04 ,  H01M4/133 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/02

    摘要： A method for quantitatively analyzing cohesive failure of an electrode analyzes cohesive failure of an electrode and includes preparing an electrode in which an electrode material mixture layer including an electrode active material, a conductive agent, and a binder is formed on a current collector, measuring shear strength (σ) data according to a cutting depth while cutting the electrode material mixture layer from a surface thereof until reaching the current collector using a surface and interfacial cutting analysis system (SAICAS), obtaining a regression curve of shear strength according to the cutting depth from the shear strength (σ) data, and determining a cutting depth, at which the shear strength is minimum in the regression curve, as a location of cohesive failure.

    Ethylene/alpha-olefin copolymer
    6.
    发明授权
    Ethylene/alpha-olefin copolymer 有权

    公开(公告)号：US10858465B2

    公开(公告)日：2020-12-08

    申请号：US16323991

    申请日：2017-10-25

    申请人： LG CHEM, LTD.

    发明人： Jeong Kyu Lee ,  Pum Suk Park ,  In Young Song ,  Sung Joon Oh ,  Yi Young Choi ,  Soon Ho Sun

    IPC分类号： C08F210/16 ,  C08F4/6592 ,  C08F4/659

    摘要： The present invention relates to an ethylene/alpha-olefin copolymer and, more particularly, to an ethylene/alpha-olefin copolymer that exhibits excellent environmental stress crack resistance by appropriately controlling the ratio of crystal structure domain and amorphous domain, and the like. The ethylene/alpha-olefin copolymer comprises an ethylene repeating unit and an alpha-olefin repeating unit, and has a crystal structure including a crystalline domain containing lamellar crystals and an amorphous domain containing a tie molecule that mediates bonding between the lamellar crystals. The lamellar crystal thickness (dc) of the ethylene/alpha-olefin copolymer as calculated from the result of Small Angle X-ray Scattering (SAXS) analysis is between 12.0 and 16.0 nm, the amorphous domain thickness (da) is between 4.0 and 5.3 nm, and the thickness ratio da/dc is between 0.3 and 0.4.

    Method for producing polyacrylonitrile-based fiber and polyacrylonitrile-based copolymer used therein
    9.
    发明授权
    Method for producing polyacrylonitrile-based fiber and polyacrylonitrile-based copolymer used therein 有权

    公开(公告)号：US11535957B2

    公开(公告)日：2022-12-27

    申请号：US16335076

    申请日：2017-11-22

    申请人： LG CHEM, LTD.

    发明人： Jeong Kyu Lee ,  Chang Hun Kim ,  In Young Song ,  Jeong Hun Cho ,  Jong Soo Do ,  Sung Joon Oh ,  Joon Hee Cho

    IPC分类号： D01F9/22 ,  C08F220/04 ,  C08F220/18 ,  C08F220/44

    摘要： The present invention relates to a method for producing a polyacrylonitrile-based fiber, wherein the method polymerizes a monomer mixture including an acrylonitrile-based monomer, a carboxylic acid-based comonomer, and an acrylate-based comonomer, wherein the acrylate-based comonomer includes the steps of producing a polyacrylonitrile-based copolymer so as to be included in an amount of 4 to 20 parts by weight based on 100 parts by weight of the monomer mixture, fiberizing the polyacrylonitrile-based copolymer, oxidizing and stabilizing the fiberized polyacrylonitrile-based copolymer, which may control the oxidation stabilization reaction, particularly the cyclization reaction. Accordingly, the energy consumption of the oxidation stabilization reaction may be reduced, economical efficiency of the production of polyacrylonitrile-based fiber may be obtained, and the physical and mechanical properties of the carbon fiber may be improved.