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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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2.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：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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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：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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