公开(公告)号：US20240356158A1

公开(公告)日：2024-10-24

申请号：US18759062

申请日：2024-06-28

申请人： SHENZHEN SENIOR TECHNOLOGY MATERIAL CO., LTD.

发明人： Yanjie WANG ,  Zelin CHEN ,  Hua SUN ,  Jianqiang SHEN ,  Bin TAN

IPC分类号： H01M50/446 ,  C08K3/22 ,  C08K3/32 ,  C08K7/02 ,  C09D129/04 ,  C09D133/02 ,  H01M50/403 ,  H01M50/42 ,  H01M50/434 ,  H01M50/449

CPC分类号： H01M50/446 ,  C09D129/04 ,  C09D133/02 ,  H01M50/403 ,  H01M50/42 ,  H01M50/434 ,  H01M50/449 ,  C08K2003/2227 ,  C08K2003/325 ,  C08K7/02 ,  C08K2201/003 ,  C08K2201/005

摘要： The present disclosure provides a coating for battery separator, a preparation method thereof, a battery separator and a battery, where a coating slurry of the coating for the battery separator includes a dispersion medium, a nanomaterial, and a polymer containing polar functional groups; the coating has a surface pore size of 10 nm-30 nm, and a surface roughness of 200 nm-500 nm, and the coating has a hydroxyl content of 100 mg KOH/g-4000 mg KOH/g. The coating for battery separator, the preparation method thereof, the battery separator and the battery can solve a problem of deformation of battery separators due to the induction of electrolyte solutions.

公开(公告)号：US20240347860A1

公开(公告)日：2024-10-17

申请号：US18753917

申请日：2024-06-25

申请人： SAMSUNG SDI CO., LTD.

发明人： Dongwan SEO ,  Gain KIM ,  Yangseob KIM ,  Yongkyoung KIM ,  Jungyoon LEE ,  Yeonjoo CHOI ,  Hyeonsun CHOI

IPC分类号： H01M50/446 ,  H01M10/0525 ,  H01M50/443 ,  H01M50/449 ,  H01M50/489

CPC分类号： H01M50/446 ,  H01M10/0525 ,  H01M50/443 ,  H01M50/449 ,  H01M50/489

摘要： The present invention relates to a rechargeable battery comprising a positive electrode, a negative electrode, and a separator between the positive electrode and the negative electrode, wherein the positive electrode comprises a positive electrode active material selected from a lithium cobalt oxide, a lithium nickel cobalt manganese oxide, a lithium nickel cobalt aluminum oxide, or a combination thereof, wherein the separator including: a porous substrate; and a coating layer on at least one surface of the porous substrate. The porous substrate essentially consists of polyolefin and the thickness of the porous substrate is about 5 μm to about 15 μm. The coating layer faces the positive electrode and includes a (meth)acrylic copolymer including a first structural unit derived from (meth)acrylamide, a second structural unit derived from (meth)acrylonitrile, and a third structural unit derived from (meth)acrylamido sulfonic acid, (meth)acrylamido sulfonic acid salt, or a combination thereof. The heat shrinkage rate in traverse direction of the separator is less than 5%.

公开(公告)号：US20240339728A1

公开(公告)日：2024-10-10

申请号：US18621159

申请日：2024-03-29

申请人： Ningde Amperex Technology Limited

发明人： Changchuan XIONG ,  Bo FENG ,  Zengbin WEI

IPC分类号： H01M50/451 ,  H01M50/414 ,  H01M50/434 ,  H01M50/446

CPC分类号： H01M50/451 ,  H01M50/414 ,  H01M50/434 ,  H01M50/446

摘要： A separator includes a substrate and a ceramic coating layer disposed on at least one surface of the substrate. The ceramic coating layer includes a first filler, a second filler, and a binder. A mass ratio between the first filler, the second filler, and the binder is (88.5 to 99):(0.5 to 10):(0.5 to 1.5). An ionic impedance of the ceramic coating layer is 0.001 Ω to 0.15 Ω. The separator based on the above settings exhibits a relatively low ionic impedance, indicating that the kinetic performance of the separator is improved. The separator as applied in an electrochemical device improves the kinetic performance of the electrochemical device.

公开(公告)号：US12113239B2

公开(公告)日：2024-10-08

申请号：US18331554

申请日：2023-06-08

申请人： SK INNOVATION CO., LTD. ,  SK IE TECHNOLOGY CO., LTD.

发明人： Heung Taek Bae ,  Chang Hee Lee ,  Won Sub Kwack ,  Tae Wook Kwon

IPC分类号： H01M50/446 ,  H01M10/052 ,  H01M50/403 ,  H01M50/449

CPC分类号： H01M50/446 ,  H01M10/052 ,  H01M50/403 ,  H01M50/449

摘要： Provided are a separator, a method of manufacturing the separator, and an electrochemical device including the separator. According to an embodiment of the present disclosure, a separator including a porous substrate and an inorganic particle layer provided on at least one surface of the porous substrate, the inorganic particle layer including inorganic particles, a hydrolytic condensate binder of a polar silane compound, and an aqueous polymer binder, wherein an amount of change in peel strength, ΔP is 1.1 or more may be provided.

公开(公告)号：US12113238B2

公开(公告)日：2024-10-08

申请号：US17463907

申请日：2021-09-01

申请人： SK Innovation Co., Ltd. ,  SK ie technology Co., Ltd.

发明人： Tae Wook Kwon ,  Heung Taek Bae ,  Dong Yeon Lee ,  Yun Bong Kim

IPC分类号： H01M50/446 ,  H01M10/052 ,  H01M50/403 ,  H01M50/42 ,  H01M50/449 ,  H01M50/489

CPC分类号： H01M50/446 ,  H01M10/052 ,  H01M50/403 ,  H01M50/42 ,  H01M50/449 ,  H01M50/489

摘要： Provided is a separator for a lithium secondary battery including a porous substrate and a coating layer including a binder and inorganic particles formed on one surface or both surfaces of the porous substrate. The binder is a binder including: (a) a (meth)acrylamide-based monomer polymerization unit, (b) a (meth)acryl-based monomer polymerization unit containing a hydroxyl group, and (c) a polyfunctional (meth)acrylamide-based monomer polymerization unit. The separator according to the present invention provides a separator for a lithium secondary battery having improved adhesive strength between the inorganic particles and the separator, showing a decreased interfacial resistance characteristic, and showing an improved air permeability.

公开(公告)号：US20240322377A1

公开(公告)日：2024-09-26

申请号：US18578816

申请日：2022-07-15

申请人： Teijin Limited

发明人： Rika KURATANI ,  Mai MIURA ,  Satoshi NISHIKAWA

IPC分类号： H01M50/491 ,  H01M10/0525 ,  H01M50/426 ,  H01M50/446 ,  H01M50/457 ,  H01M50/46

CPC分类号： H01M50/491 ,  H01M10/0525 ,  H01M50/426 ,  H01M50/446 ,  H01M50/457 ,  H01M50/461

摘要： Provided is a separator for a non-aqueous secondary battery, the separator contains a porous substrate and an adhesive porous layer that is provided on one side or on both sides of the porous substrate, and that contains a polyvinylidene fluoride type resin and a filler, in which the porous substrate contains a fluorine atom, and when differential scanning calorimetry is performed with all of the polyvinylidene fluoride type resin contained in the adhesive porous layer as a sample, two or more endothermic peaks and/or two or more exothermic peaks are observed.

公开(公告)号：US20240322368A1

公开(公告)日：2024-09-26

申请号：US18433040

申请日：2024-02-05

申请人： LG ENERGY SOLUTION, LTD.

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.

公开(公告)号：US20240322260A1

公开(公告)日：2024-09-26

申请号：US18731354

申请日：2024-06-03

申请人： CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

发明人： Hailin Zou ,  Peipei Chen

IPC分类号： H01M10/42 ,  C07D213/79 ,  C07F9/50 ,  H01M10/0525 ,  H01M10/054 ,  H01M50/417 ,  H01M50/426 ,  H01M50/434 ,  H01M50/443 ,  H01M50/446 ,  H01M50/451 ,  H01M50/457 ,  H01M50/489

CPC分类号： H01M10/4235 ,  C07D213/79 ,  C07F9/5004 ,  C07F9/5022 ,  H01M10/0525 ,  H01M10/054 ,  H01M50/417 ,  H01M50/426 ,  H01M50/434 ,  H01M50/443 ,  H01M50/446 ,  H01M50/451 ,  H01M50/457 ,  H01M50/489 ,  H01M2220/20

摘要： The present application provides a secondary battery and an electrical apparatus containing the same. The secondary battery includes a positive electrode sheet, a negative electrode sheet, a separator disposed between the positive electrode sheet and the negative electrode sheet, and an electrolyte solution, wherein the separator includes a substrate and an inorganic and/or organic particle layer disposed on at least one surface of the substrate, and the separator further includes an acid scavenging additive located among the inorganic and/or organic particles of the inorganic and/or organic particle layer or located in a form of a separate layer between the substrate and the inorganic and/or organic particle layer, wherein the maximum dissolution amount of the acid scavenging additive in the electrolyte solution at 25° C. is less than 1% by mass relative to the mass of the electrolyte solution.

公开(公告)号：US20240313352A1

公开(公告)日：2024-09-19

申请号：US18657806

申请日：2024-05-08

申请人： CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

发明人： Xiaonan Cheng ,  Haiyi Hong ,  Yanyun Ma ,  Jianrui Yang ,  Yi Zheng ,  Chengdong Sun

IPC分类号： H01M50/451 ,  H01M50/403 ,  H01M50/42 ,  H01M50/434 ,  H01M50/443 ,  H01M50/446 ,  H01M50/489

CPC分类号： H01M50/451 ,  H01M50/403 ,  H01M50/42 ,  H01M50/434 ,  H01M50/443 ,  H01M50/446 ,  H01M50/489 ,  H01M2220/20

摘要： This application discloses a separator and a preparation method therefor, a battery, and an electric apparatus. The separator includes a substrate and a pressure-sensitive coating, where the pressure-sensitive coating is formed on at least a portion of surface of the substrate. The pressure-sensitive coating includes composite particles and a first plasticizer. The composite particles form bulges on surface of the coating, and the composite particles include polyacrylate particles and inorganic particles. The inorganic particle is present between at least two of the polyacrylate particles, and solubility parameter of the first plasticizer and solubility parameter of the composite particles have a difference with an absolute value of 0.3 MPa1/2-4 MPa1/2.

公开(公告)号：US12095091B2

公开(公告)日：2024-09-17

申请号：US16973664

申请日：2019-06-28

申请人： TEIJIN LIMITED

发明人： Tetsuya Akamatsu

IPC分类号： H01M4/62 ,  H01M10/0525 ,  H01M50/423 ,  H01M50/443 ,  H01M50/446 ,  H01M50/449

CPC分类号： H01M4/622 ,  H01M10/0525 ,  H01M50/423 ,  H01M50/443 ,  H01M50/446 ,  H01M50/449

摘要： Provided is a binder for use in an electrode layer or separator for a lithium-ion secondary battery, wherein the binder is unlikely to cause powder removal and does not completely cover the surface of the active material particles when used in an electrode layer as a binder. The binder of the present invention is a binder for a non-aqueous secondary battery, the binder comprising a fibrid of an aromatic polyamide, wherein the fibrid swells and is not dissolved in an N-methyl-2-pyrrolidone solvent in which an alkali metal salt and/or an alkaline earth metal salt is present at a concentration of 1,000 ppm or less, and is completely dissolved in an N-methyl-2-pyrrolidone solvent in which an alkali metal salt and/or an alkaline earth metal salt is present at a concentration of 10,000 ppm or more.