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公开(公告)号：US20240286915A1
公开(公告)日：2024-08-29
申请号：US18444028
申请日：2024-02-16
发明人： So-Mi JEONG , Seong-Jun KIM , Yeong-Ha KIM , Ji-Hyun BANG , Yeo-Ju YOON
IPC分类号： C01F7/00 , H01M10/052 , H01M50/44 , H01M50/446 , H01M50/454
CPC分类号： C01F7/00 , H01M10/052 , H01M50/44 , H01M50/446 , H01M50/454 , C01P2004/61
摘要： There are disclosed aluminum trihydroxide particles in which a D50 of the particles is about 3.0 μm or less, a BET of about 3.0 m2/g or more, and a Li content of about 500 ppm or more.
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公开(公告)号：US20240222794A1
公开(公告)日：2024-07-04
申请号：US18288283
申请日：2023-02-27
发明人： Won-Sik BAE , So-Yeong LEE , So-Jung PARK , So-Mi JEONG
IPC分类号： H01M50/451 , H01M10/0525 , H01M50/403 , H01M50/443
CPC分类号： H01M50/451 , H01M50/403 , H01M50/443 , H01M10/0525
摘要： A separator according to the present disclosure includes an organic/inorganic composite porous coating layer on a surface of a porous polymer substrate. The organic/inorganic composite porous coating layer includes a first region comprising a larger amount of inorganic particles and a second region comprising a smaller amount of inorganic particles so that electrolyte wettability is improved by the first region and high adhesion strength with electrode is maintained by the second region.
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3.发明公开公开(公告)号：US20230216145A1
公开(公告)日：2023-07-06
申请号：US18008530
申请日：2021-06-30
发明人： Da-Kyung HAN , So-Mi JEONG , Kyung-An KWON , Min-Ji KIM
IPC分类号： H01M50/489 , H01M50/449 , H01M50/446 , H01M50/417 , H01M50/426 , H01M50/403 , H01M10/052
CPC分类号： H01M50/489 , H01M50/449 , H01M50/446 , H01M50/417 , H01M50/426 , H01M50/403 , H01M10/052
摘要： A separator for a lithium secondary battery and a method for manufacturing the same. The separator for a lithium secondary battery includes: a porous polymer substrate; and a porous coating layer on at least one surface of the porous polymer substrate. The porous coating layer includes inorganic particles, a fluorine-containing binder polymer (A), and an ethylenic copolymer (B) having an ethylene monomer-derived repeating unit (a) and a vinyl acetate monomer-derived repeating unit (b). It is possible to provide a separator having improved adhesion peel strength between the porous coating layer and the porous polymer substrate and improved adhesion Lami strength to an electrode at the same time and a method for manufacturing the same by using an ethylenic copolymer having predetermined characteristics.
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公开(公告)号：US20240332737A1
公开(公告)日：2024-10-03
申请号：US18579055
申请日：2022-10-12
发明人： So-Yeong LEE , So-Jung PARK , Won-Sik BAE , Jong-Yoon LEE , So-Mi JEONG
IPC分类号： H01M50/451 , H01M50/417 , H01M50/463 , H01M50/491 , H01M50/531
CPC分类号： H01M50/451 , H01M50/417 , H01M50/463 , H01M50/491 , H01M50/531
摘要： Disclosed is a separator including a separator substrate and an inorganic coating layer disposed on at least one surface of the substrate, wherein a concave pattern portion having a concave pattern is applied merely at the outer circumferential end of the separator substrate. The separator may show excellent resistance characteristics, while ensuring high binding force between the separator substrate and the inorganic coating layer by virtue of such a structural feature. In addition, in the electrochemical device including the separator, the concave pattern portion at the outer circumferential end of the separator is disposed in such a manner that it may be overlapped with the tab portion of an electrode, when the separator is applied to an electrode assembly. In this manner, it is possible to prevent lithium plating.
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公开(公告)号：US20240304868A1
公开(公告)日：2024-09-12
申请号：US18273639
申请日：2023-01-12
发明人： So-Yeong LEE , Won-Sik BAE , Kyung-Tae KIM , So-Jung PARK , Kyeong-Hui BAE , So-Mi JEONG
IPC分类号： H01M10/0583 , H01M10/052 , H01M50/417 , H01M50/431 , H01M50/443 , H01M50/451 , H01M50/457 , H01M50/46 , H01M50/466 , H01M50/489
CPC分类号： H01M10/0583 , H01M10/052 , H01M50/417 , H01M50/431 , H01M50/443 , H01M50/451 , H01M50/457 , H01M50/46 , H01M50/466 , H01M50/489
摘要： A separator, an electrode assembly and an electrochemical device including the same are provided. The separator is used for a zigzag stacking-type electrode assembly, and includes a porous substrate made of a polymer material and a porous coating layer formed on opposite surfaces of the porous substrate and containing inorganic particles. A thickness (Ts) of the porous substrate decreases gradually from opposite ends toward a central portion based on a longitudinal direction of the separator, a total thickness (Tc) of the porous coating layers increases gradually toward the central portion, and a total thickness (Ts+Tc) of the separator is constant.
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公开(公告)号：US20240021960A1
公开(公告)日：2024-01-18
申请号：US18372682
申请日：2023-09-25
发明人： So-Mi JEONG , Dong-Wook SUNG , Dae-Sung JANG
IPC分类号： H01M50/489 , H01M50/417 , H01M50/426 , H01M50/446 , H01M50/451 , H01M50/434 , H01M10/052 , H01M50/443
CPC分类号： H01M50/489 , H01M50/417 , H01M50/426 , H01M50/446 , H01M50/451 , H01M50/434 , H01M10/052 , H01M50/443
摘要： The present disclosure relates to a separator for a lithium secondary battery comprising a porous substrate, and a porous coating layer disposed on at least one surface of the porous substrate and comprising inorganic particles and binder polymer, wherein the binder polymer is terpolymer including 65 to 90 weight % of a repeat unit derived from vinylidenefluoride (VDF), 1 to 28 weight % of a repeat unit derived from hexafluoropropylene (HFP) and 5 to 28 weight % of a repeat unit derived from chlorotrifluoroethylene (CTFE), and the separator has adhesiveness towards electrode ranging from 30 gf/25 mm to 150 gf/25 mm and machine direction (MD) thermal shrinkage of 1 to 18% and transverse direction (TD) thermal shrinkage of 1 to 17%, and a lithium secondary battery comprising the same, wherein the separator has uniform micropores on the surface, and thus has the increased adhesive surface area with electrode and consequential improved adhesiveness towards electrode.
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公开(公告)号：US20230178852A1
公开(公告)日：2023-06-08
申请号：US17922995
申请日：2021-06-18
发明人： So-Mi JEONG , Da-Kyung HAN , Min-Ji KIM
IPC分类号： H01M50/446 , H01M10/052 , H01M50/403 , H01M4/62 , H01M50/449
CPC分类号： H01M50/446 , H01M4/622 , H01M10/052 , H01M50/403 , H01M50/449
摘要： A method for manufacturing a separator for a lithium secondary battery. Particularly, the method for manufacturing a separator for a lithium secondary battery includes the steps of: preparing a slurry for forming a porous coating layer. The porous coating layer includes inorganic particles dispersed in an asymmetric linear ketone solvent and a binder polymer, including a first binder polymer and a second binder polymer, dissolved therein; and applying the slurry for forming a porous coating layer onto a porous polymer substrate having a plurality of pores, followed by drying. The slurry for forming a porous coating layer may be prepared by dissolving a first binder polymer and a second binder polymer having predetermined properties in an asymmetric ketone solvent, and a separator may be obtained by using the slurry for forming a porous coating layer.
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公开(公告)号：US20220247034A1
公开(公告)日：2022-08-04
申请号：US17617804
申请日：2020-06-11
发明人： So-Mi JEONG , Min-Ji KIM , Chan-Jong KIM , Da-Kyung HAN
IPC分类号： H01M50/403 , H01M10/0525 , H01M4/62 , H01M50/446
摘要： Disclosed are a method for manufacturing a separator and a separator obtained thereby. The method includes forming a porous coating layer by using slurry for forming a porous coating layer including inorganic particles, lithium halide and a polyvinylidene fluoride-based binder polymer. It is possible to provide a separator showing reduced resistance and an electrochemical device including the same by modifying the properties of the binder polymer.
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公开(公告)号：US20220238960A1
公开(公告)日：2022-07-28
申请号：US17617773
申请日：2020-06-08
发明人： So-Mi JEONG , Dong-Wook SUNG
IPC分类号： H01M50/451 , H01M50/426 , H01M50/446
摘要： A separator including a porous polymer substrate, and a porous coating layer, and an electrochemical device comprising the same. The porous coating layer includes P(VDF-TrFE-CTFE) and PVDF-CTFE as a binder polymer. The separator has a lower resistance by changing the characteristics of the binder polymer.
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公开(公告)号：US20240322368A1
公开(公告)日：2024-09-26
申请号：US18433040
申请日：2024-02-05
发明人： Kyung-Tae KIM , Dong-Hun BAE , Yong-Hyeok LEE , So-Mi JEONG
IPC分类号： H01M50/446 , H01M10/052 , H01M50/403 , H01M50/44
CPC分类号： H01M50/446 , H01M10/052 , H01M50/403 , H01M50/44
摘要： A method for manufacturing a non-woven separator for a lithium secondary battery, includes: (S1) preparing a first solution of β-chitin dissolved in a first solvent and a second solution of vinylidene fluoride-trifluoroethylene copolymer (PVDF-TrFE) dissolved in a second solvent; (S2) coaxial electrospinning with the first solution as a core solution and the second solution as a shell solution to produce a non-woven fabric formed of a fiber with a core-shell structure having a core portion of the β-chitin and a shell portion of the vinylidene fluoride-trifluoroethylene copolymer; and (S3) performing heat treatment on the non-woven fabric at a temperature lower than a thermal decomposition point of the β-chitin and higher than a melting point of the vinylidene fluoride-trifluoroethylene copolymer to melt and recrystallize the vinylidene fluoride-trifluoroethylene copolymer.
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