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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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公开(公告)号：US10938065B2
公开(公告)日：2021-03-02
申请号：US16307283
申请日：2017-04-12
发明人： Alex Cheng , Honggui Deng , Lei Xiong , Lihua Wang , Fangbo He , Weiqiang Wang
IPC分类号： H01M10/0565 , C08J5/18 , H01M10/052 , H01M10/0525 , H01M10/0568
摘要： The invention discloses a polymer electrolyte membrane and a method for preparing the same. The method comprises the steps of: (1) mixing a molecular sieve material, a polymer and a solvent to obtain a slurry; (2) coating the slurry on a base membrane to form a wet membrane; (3) drying the wet membrane to obtain a dry membrane; and (4) immersing the dry membrane in a lithium salt electrolyte solution, and taking out to obtain a polymer electrolyte membrane.
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公开(公告)号：US20190157645A1
公开(公告)日：2019-05-23
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
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：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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7.发明申请公开(公告)号：US20190088985A1
公开(公告)日：2019-03-21
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
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：US11325074B2
公开(公告)日：2022-05-10
申请号：US16477642
申请日：2018-05-21
发明人： Alex Cheng , Lei Xiong
IPC分类号： B01D67/00 , B01D69/02 , B01D71/26 , B01D71/38 , C02F1/44 , H01M50/417 , H01M50/406 , H01M10/0525
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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9.发明申请公开(公告)号：US20200067053A1
公开(公告)日：2020-02-27
申请号：US16085703
申请日：2017-02-10
发明人： Alex Cheng , Fangbo He , Jinzhen Bao
IPC分类号： H01M2/16 , H01M10/0525 , C08J9/28 , H01M10/0565 , H01M6/18
摘要： The present invention discloses a separator for an electrochemical device and a preparing method and use thereof. The separator comprises a porous base film layer and a functional layer; the porous base film layer optionally has an inorganic material coating on one or two surfaces thereof; the functional layer is disposed on one or two sides of the porous base film layer, and the functional layer contains at least one organic material capable of forming a gel electrode when contacting with a non-aqueous electrolyte solution.
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公开(公告)号：US20190140319A1
公开(公告)日：2019-05-09
申请号：US16307283
申请日：2017-04-12
发明人： Alex Cheng , Honggui Deng , Lei Xiong , Lihua Wang , Fangbo He , Weiqiang Wang
IPC分类号： H01M10/0565 , H01M10/0525 , H01M10/0568
摘要： The invention discloses a polymer electrolyte membrane and a method for preparing the same. The method comprises the steps of: (1) mixing a molecular sieve material, a polymer and a solvent to obtain a slurry; (2) coating the slurry on a base membrane to form a wet membrane; (3) drying the wet membrane to obtain a dry membrane; and (4) immersing the dry membrane in a lithium salt electrolyte solution, and taking out to obtain a polymer electrolyte membrane.
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