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公开(公告)号：US20220029244A1
公开(公告)日：2022-01-27
申请号：US17296516
申请日：2019-08-09
发明人： Yongkyoung KIM , Gain KIM , Jungyoon LEE , Yeonjoo CHOI , Yangseob KIM
IPC分类号： H01M50/449 , H01M50/411 , H01M50/446 , C08K3/013 , C08L25/14 , C08L33/02 , C08L33/08 , C08L33/26
摘要： The present invention relates to a separator for a lithium secondary battery, and a lithium secondary battery including same. The separator includes a porous substrate, and a coating layer on at least one surface of the porous substrate, wherein the coating layer includes a heat-resistant binder including a (meth)acrylic copolymer including a first structural unit derived from (meth)acrylamide, and a second structural unit including at least one of a structural unit derived from (meth)acrylic acid or (meth)acrylate, and a structural unit derived from (meth)acrylamidosulfonic acid or a salt; an adhesive binder having a core-shell structure; and inorganic particles, wherein the adhesive binder has an average particle diameter of 0.2 μm to 1.0 μm, and the inorganic particles have an average particle diameter of 0.2 μm to 1.0 μm.
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2.发明申请公开(公告)号：US20190140262A1
公开(公告)日：2019-05-09
申请号：US16180617
申请日：2018-11-05
发明人： Yongseok KIM , Jaehou NAH , Yeonjoo CHOI
摘要： A negative active material for a rechargeable lithium battery includes a silicon-carbon composite including crystalline carbon and a silicon particle. The silicon-carbon composite further includes an alkali metal or an alkaline-earth metal. The alkali metal or the alkaline-earth metal is present in the silicon-carbon composite in an amount of greater than or equal to about 500 ppm and less than about 5,000 ppm by weight.
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公开(公告)号：US20240347860A1
公开(公告)日：2024-10-17
申请号：US18753917
申请日：2024-06-25
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%.
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公开(公告)号：US20220102810A1
公开(公告)日：2022-03-31
申请号：US17416686
申请日：2019-08-09
发明人： Yongkyoung KIM , Gain KIM , Jungyoon LEE , Yeonjoo CHOI , Yangseob KIM
IPC分类号： H01M50/446 , H01M10/0525 , H01M50/449 , C08F220/56 , C08L33/12 , C09D133/12 , C09D133/26
摘要： The present invention relates to a separator for a lithium secondary battery, and a lithium secondary battery including the same, the separator including a porous substrate and a coating layer located on at least one surface of the porous substrate, wherein the coating layer includes a heat-resistant binder including 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)acrylaminosulfonic acid, a (meth)acrylaminosulfonate or a combination thereof; an adhesive binder having a core-shell structure; and inorganic particles, wherein the adhesive binder has an average particle diameter of 0.2 μm to 1.0 μm, and the inorganic particles have an average particle diameter of 0.2 μm to 1.0 μm.
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公开(公告)号：US20170263921A1
公开(公告)日：2017-09-14
申请号：US15451984
申请日：2017-03-07
发明人： Yeonjoo CHOI , Junghyun NAM , Bokkyu JEON , Hoon SEOK
IPC分类号： H01M4/36 , H01M10/052 , H01M4/58 , H01M4/505 , H01M4/525 , H01M4/62 , H01M10/0565
CPC分类号： H01M4/364 , H01M4/505 , H01M4/525 , H01M4/5825 , H01M4/5835 , H01M4/622 , H01M4/624 , H01M4/625 , H01M10/052 , H01M10/0565 , H01M2004/028 , H01M2300/0082
摘要： A positive active material composition for a lithium secondary battery includes a positive active material that allows intercalation and deintercalation of lithium ions, a binder, and a conductive agent. The conductive agent includes a first conductive agent having an average particle diameter (D50) ranging from about 20 nanometers (nm) to about 40 nm and a second conductive agent having a D50 ranging from about 1 micrometer (μm) to about 5 μm.
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6.发明公开公开(公告)号：US20230307607A1
公开(公告)日：2023-09-28
申请号：US18326895
申请日：2023-05-31
发明人： Ji Woo AHN , Dongwoo KIM , Jaehou NAH , Bumjin CHANG , Yurim CHA , Yeonjoo CHOI , Ilyoung CHOI
摘要： A negative active material for a rechargeable lithium battery and a rechargeable lithium battery including the same are disclosed, and the negative active material includes a primary particle of a crystalline carbon-based material and secondary particle that is an assembly of the primary particles, wherein a ratio of an average particle diameter (D50) of the secondary particle relative to an average particle diameter (D50) of the primary particle (average particle diameter (D50) of the secondary particle/average particle diameter (D50) of the primary particle) ranges from about 1.5 to about 5 and an aspect ratio of the primary particle ranges from about 1 to about 7.
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公开(公告)号：US20220037739A1
公开(公告)日：2022-02-03
申请号：US17297373
申请日：2019-08-09
发明人： Jungyoon LEE , Gain KIM , Yangseob KIM , Yongkyoung KIM , Dongwan SEO , Yeonjoo CHOI , Hyeonsun CHOI
IPC分类号： H01M50/446 , H01M10/0525 , H01M4/62
摘要： The present invention relates to a separator for a lithium secondary battery, and a lithium secondary battery including the same. The separator includes a porous substrate and a coating layer on at least one surface of the porous substrate, wherein the coating layer includes a binder including 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)acrylamidosulfonic acid, a (meth)acrylamidosulfonic acid salt or a combination thereof; first inorganic particles; and second inorganic particles, wherein the average diameter of the first inorganic particles is 400 nm to 600 nm, and the average diameter of the second inorganic particles is smaller than the average diameter of the first inorganic particles.
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公开(公告)号：US20220021076A1
公开(公告)日：2022-01-20
申请号：US17296528
申请日：2019-07-24
发明人： Dongwan SEO , Gain KIM , Yangseob KIM , Yongkyoung KIM , Jungyoon LEE , Yeonjoo CHOI , Hyeonsun CHOI
IPC分类号： H01M50/446 , H01M50/449 , H01M10/0525
摘要： The present invention relates to a separator for a lithium secondary battery and a lithium secondary battery including same, the separator including: a porous substrate; and a coating layer on at least one surface of the porous substrate. The coating layer 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 first structural unit is included in an amount of 55 mol % to 90 mol % based on 100 mol % of the (meth)acrylic copolymer and the second structural unit and third structural unit are each independently included in 5 mol % to 40 mol % based on 100 mol % of the (meth)acrylic copolymer. The (meth)acrylic copolymer has a weight average molecular weight of 200,000 to 700,000.
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公开(公告)号：US20210305659A1
公开(公告)日：2021-09-30
申请号：US17133186
申请日：2020-12-23
申请人： SAMSUNG SDI CO., LTD. , IUCF-HYU (Industry-University Cooperation Foundation Hanyang University)
发明人： Gain KIM , Yeonjoo CHOI , Jayeon GU , Yangseob KIM , Jae Hoon KIM , Sun Ju MOON , Young Moo LEE
IPC分类号： H01M50/449 , H01M10/0525 , H01M10/44 , C09D133/02 , C08L79/08 , C09D7/40 , C09D7/65 , H01M50/491 , C09D133/26
摘要： This application relates to a coating layer composition and a coating layer formed using the coating layer composition. The coating layer composition includes a heat-resistant binder, a hydroxy group-containing polyimide particle, a silane cross-linking agent, and a solvent. The hydroxy group-containing polyimide particle and the functional group-containing silane cross-linking agent form a core-shell structured organic particle in which a core portion is derived from the hydroxy group-containing polyimide particles and a shell portion that is derived from the functional group-containing silane cross-linking agent. The shell portion is on the surface of the core portion in the core-shell structured organic particle. The application also relates to a separator for a rechargeable lithium battery and a rechargeable lithium battery including the separator having a coating layer formed using the coating layer composition.
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公开(公告)号：US20210226299A1
公开(公告)日：2021-07-22
申请号：US17273238
申请日：2019-07-16
发明人： Yeonjoo CHOI , Gain KIM , Yangseob KIM , Yongkyoung KIM , Dongwan SEO , Jungyoon LEE , Hyeonsun CHOI
IPC分类号： H01M50/42 , H01M50/434 , H01M50/443 , H01M50/446 , H01M50/451 , H01M10/0525
摘要： Disclosed is a separator for a lithium secondary battery including a porous substrate, and a coating layer on at least one surface of the porous substrate, wherein the coating layer includes an acrylic copolymer including a first structural unit derived from (meth)acrylamide, and a second structural unit including at least one of a structural unit derived from (meth)acrylic acid and (meth)acrylate, and a structural unit derived from (meth)acrylamidosulfonic acid and a salt thereof, the first structural unit is included in an amount of 55 mol % to 95 mol % with respect to 100 mol % of the acrylic copolymer, and the second structural unit is included in an amount of 5 mol % to 45 mol % with respect to 100 mol % of the acrylic copolymer, and a lithium secondary battery including the same.
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