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1.发明公开公开(公告)号：US20230395936A1
公开(公告)日：2023-12-07
申请号：US18034652
申请日：2021-09-14
发明人： Yue CHENG , Xiaoming GONG , Kun PENG , Shaobo YU , Zhi ZHUANG
IPC分类号： H01M50/417 , H01M50/491 , H01M50/494 , H01M50/403 , H01M50/451
CPC分类号： H01M50/417 , H01M50/491 , H01M50/494 , H01M50/403 , H01M50/451
摘要： The present disclosure relates to the field of battery separators, and in particular discloses a polyolefin microporous membrane with a thickness of 2 to 30 μm, a puncture strength of 1000 to 2000 gf, a tensile strength of 3200 to 5000 kgf/cm2 along an MD direction, a tensile strength of 2800 to 4800 kgf/cm2 along a TD direction, a porosity of 40% to 57%, a maximum pore size of 33 to 48 nm, an air permeability of 10 to 400 s/100 ml, and an impedance of 0.3 to 0.952/cm2, and a manufacturing system thereof, and a coated separator and an electrochemical apparatus using the basal membrane. In the present disclosure, the polyolefin microporous membrane has excellent performance and its thickness, tensile strength, puncture strength, air permeability, porosity and thermal shrinkage rate all can satisfy the applications having high requirements for the thickness and mechanical strength of the microporous membranes.
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公开(公告)号：US11158905B2
公开(公告)日：2021-10-26
申请号：US16086595
申请日：2018-05-10
发明人： Alex Cheng , Honggui Deng , Yongle Chen , Fangbo He , Hui Chen
IPC分类号： H01M4/02 , H01M50/446 , H01M50/403 , H01M50/426 , H01M50/431 , C09D127/16 , C08K3/22
摘要： Disclosed are a coating slurry for preparing a separator for an electrochemical device, comprising at least one polymer having an intrinsic viscosity ranging from 0.5 to 3.0 mL/g, at least one inorganic filler, and at least one solvent; a method for preparing the coating slurry; and a method for preparing a separator for an electrochemical device using the coating slurry; as well as a separator and an electrochemical device comprising the separator.
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公开(公告)号：US20210218111A1
公开(公告)日：2021-07-15
申请号：US16086595
申请日：2018-05-10
发明人： Alex CHENG , Honggui DENG , Yongle CHEN , Fangbo HE , Hui CHEN
IPC分类号： H01M50/446 , H01M50/403 , H01M50/426 , H01M50/431 , C09D127/16
摘要： Disclosed are a coating slurry for preparing a separator for an electrochemical device, comprising at least one polymer having an intrinsic viscosity ranging from 0.5 to 3.0 mL/g, at least one inorganic filler, and at least one solvent; a method for preparing the coating slurry; and a method for preparing a separator for an electrochemical device using the coating slurry; as well as a separator and an electrochemical device comprising the separator.
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4.发明授权公开(公告)号：US11018370B2
公开(公告)日：2021-05-25
申请号：US16095235
申请日：2017-04-06
发明人： Alex Cheng , Lei Xiong , Honggui Deng , Fangbo He , Weiqiang Wang
IPC分类号： H01M10/0525 , H01M10/0565 , H01G9/02 , H01M2/16 , C08L61/16 , B29D7/01 , C08J9/28 , C08L27/16 , C08L23/06 , H01M50/40 , H01M50/409 , H01M50/449
摘要： The invention discloses a separator with a wide temperature range and a low heat shrinkage and a method for preparing the same. The invention belongs to the field of electrochemistry. The separator of the invention includes: an irradiation crosslinked fluoropolymer A with a melting point above 150° C. and/or a polymer B containing a benzene ring in its main chain; an ultrahigh molecular weight polyethylene having a molecular weight of 1.0×106-10.0×106, and a high density polyethylene having a density in the range of 0.940-0.976 g/cm3; the temperature difference between pore closing temperature and film breaking temperature of the separator is 80-90° C., preferably 85-90° C., the heat shrinkage of the separator is 2.0% or less. The separator of the invention has a high temperature difference between film breaking temperature and pore closing temperature, and a low heat shrinkage; when the separator of the invention is used in an electrochemical device, the reliability and safety of electrochemical device can be effectively improved.
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公开(公告)号：US20190393463A1
公开(公告)日：2019-12-26
申请号：US16082711
申请日：2017-02-08
发明人： Alex Cheng , Xiaoming Su , Weiqiang Wang , Fangbo He , Yongle Chen
IPC分类号： H01M2/14 , H01M10/0525 , H01M2/16 , B29C41/00 , B29C55/00 , B29C55/16 , B29C67/20 , B29C71/02
摘要： A method for preparing a lithium-ion battery separator is disclosed. The method comprises: cooling and shaping a liquid-phase stabilization system containing polyethylene, stretching to enlarge pores, extracting with a solvent, and heat-setting to obtain a lithium-ion battery separator, wherein the stretching includes pre-stretching and synchronous bidirectional stretching, and the pre-stretching is completed before the synchronous bidirectional stretching.
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公开(公告)号：US12021256B2
公开(公告)日：2024-06-25
申请号：US17254390
申请日：2019-06-24
发明人： Alex Cheng , Xudong Li , Gang Min , Honggui Deng , Hui Chen , Qi Yue , Chao Feng , Xianghua Li , Kang Wang , An Wang , Yangyang Chen
IPC分类号： H01M50/403 , H01M50/417 , H01M50/434 , H01M50/443 , H01M50/446 , H01M50/451 , H01M50/457 , H01M50/489 , H01M50/491
CPC分类号： H01M50/403 , H01M50/417 , H01M50/434 , H01M50/443 , H01M50/446 , H01M50/451 , H01M50/457 , H01M50/489 , H01M50/491
摘要： Disclosed are a separator for an electrochemical device, comprising a porous base membrane, a coating layer disposed on at least one side of the porous base membrane and at least one channel for ionic flow, wherein the coating layer comprises at least one organic material with, for example, a core-shell structure that melts when the electrochemical device is overheated to a temperature that is higher than the melting point of the at least one organic material to block the at least one channel for ionic flow; as well as an electrochemical device comprising the separator and a method for making the separator.
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公开(公告)号：US11031654B2
公开(公告)日：2021-06-08
申请号：US16306554
申请日：2017-04-13
发明人： Alex Cheng , Lei Xiong , Honggui Deng , Fangbo He , Weiqiang Wang
IPC分类号： H01M2/16 , H01M10/0525 , H01M2/14 , H01M50/409 , H01M50/40 , H01M50/403 , B29K23/00 , H01M4/02
摘要： Disclosed in present invention are a high-wettability separator and a preparation method therefor. The separator comprises an ethylene copolymer, a grafting polyolefin, an ultrahigh molecular weight polyethylene having a molecular weight ranging from 1.0×106 to 10.0×106, and a high-density polyethylene having a density ranging from 0.940 g/cm3 to 0.976 g/cm3, the content of the ethylene copolymer is 1-5 parts by weight, and the content of the grafting polyolefin is 0-5 parts by weight, on the basis that the total weight of the ultrahigh molecular weight polyethylene and the high-density polyethylene is 100 parts. The separator has a contact angle with lithium ion battery electrolyte of 20° to 40°.
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公开(公告)号：US20230187781A1
公开(公告)日：2023-06-15
申请号：US17926345
申请日：2021-03-11
发明人： Yue CHENG , Yongle CHEN , Xinyu SHI , Jun HU , Shaobo YU
IPC分类号： H01M50/446 , H01M50/449 , H01M50/403
CPC分类号： H01M50/446 , H01M50/403 , H01M50/449
摘要： Disclosed in the present invention is an isolating membrane of an electrochemical device, comprising a modified porous base membrane and a functional layer arranged on the surface of at least one side of the modified porous base membrane. The functional layer contains slurry of organic matter and inorganic matter compounds, and the modified porous base membrane contains particles of a lithium-containing conductive ion compound. According to the present invention, the lithium-containing conductive ion compound is prepared by adopting a sol-gel-hydrothermal method, and small-particle-size particles of the lithium-containing conductive ion compound are embedded into the isolating membrane base membrane, so that the defects of poor ionic conductivity and poor wettability of an existing isolating membrane are overcome, and moreover, the isolating membrane has good adhesion and heat resistance due to the coated functional layer.
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公开(公告)号：US20210331119A1
公开(公告)日：2021-10-28
申请号：US16477642
申请日：2018-05-21
发明人： Alex Cheng , Lei Xiong
IPC分类号： B01D67/00 , B01D71/26 , B01D69/02 , C02F1/44 , B01D71/38 , H01M50/417 , H01M50/406
摘要： The present invention provides a porous membrane for water treatment, comprising: a high molecular weight polyethylene, a water-soluble polymer and an antioxidant, the high molecular weight polyethylene having an average molecular weight of 1.0×105 to 10.0×106 and a density of 0.940 to 0.976 g/cm3; wherein, the weight of the water-soluble polymer is 5 to 50 parts, the weight of the antioxidant is 0.1 to 10 parts, based on 100 parts of the weight of the high molecular weight polyethylene. The porous membrane for water treatment prepared by the present invention has a thickness of 5 to 30 μm, a pore size of 10 to 100 nm, a porosity of 20 to 60%, and a surface contact angle of 30° to 95°. The porous membrane according to the present invention has good durability, simple preparation process, and relatively thin thickness, a uniform pore size distribution and small pore size, good hydrophilicity, as well as good filtration and adsorption effect.
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公开(公告)号：US11101524B2
公开(公告)日：2021-08-24
申请号：US16082711
申请日：2017-02-08
发明人： Alex Cheng , Xiaoming Su , Weiqiang Wang , Fangbo He , Yongle Chen
IPC分类号： B29C55/16 , H01M50/403 , B29C41/00 , B29C55/00 , B29C67/20 , B29C71/02 , H01M10/0525 , H01M50/411 , B29L31/34
摘要： A method for preparing a lithium-ion battery separator is disclosed. The method comprises: cooling and shaping a liquid-phase stabilization system containing polyethylene, stretching to enlarge pores, extracting with a solvent, and heat-setting to obtain a lithium-ion battery separator, wherein the stretching includes pre-stretching and synchronous bidirectional stretching, and the pre-stretching is completed before the synchronous bidirectional stretching.
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