KR102342669B1 - 리튬 이차 전지용 분리막 및 이를 포함하는 리튬 이차 전지 - Google Patents
리튬 이차 전지용 분리막 및 이를 포함하는 리튬 이차 전지 Download PDFInfo
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- KR102342669B1 KR102342669B1 KR1020190005932A KR20190005932A KR102342669B1 KR 102342669 B1 KR102342669 B1 KR 102342669B1 KR 1020190005932 A KR1020190005932 A KR 1020190005932A KR 20190005932 A KR20190005932 A KR 20190005932A KR 102342669 B1 KR102342669 B1 KR 102342669B1
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- South Korea
- Prior art keywords
- meth
- separator
- structural unit
- secondary battery
- lithium secondary
- Prior art date
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- 239000000758 substrate Substances 0.000 claims abstract description 29
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- 239000011247 coating layer Substances 0.000 claims abstract description 26
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- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
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- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 3
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- 229910052703 rhodium Inorganic materials 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 229910021481 rutherfordium Inorganic materials 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- 229910021477 seaborgium Inorganic materials 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002153 silicon-carbon composite material Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 229910021384 soft carbon Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 125000003011 styrenyl group Chemical group [H]\C(*)=C(/[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical class O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- 125000001273 sulfonato group Chemical group [O-]S(*)(=O)=O 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000010557 suspension polymerization reaction Methods 0.000 description 1
- 229910052713 technetium Inorganic materials 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- SJMYWORNLPSJQO-UHFFFAOYSA-N tert-butyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC(C)(C)C SJMYWORNLPSJQO-UHFFFAOYSA-N 0.000 description 1
- WMOVHXAZOJBABW-UHFFFAOYSA-N tert-butyl acetate Chemical compound CC(=O)OC(C)(C)C WMOVHXAZOJBABW-UHFFFAOYSA-N 0.000 description 1
- ISXSCDLOGDJUNJ-UHFFFAOYSA-N tert-butyl prop-2-enoate Chemical compound CC(C)(C)OC(=O)C=C ISXSCDLOGDJUNJ-UHFFFAOYSA-N 0.000 description 1
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 1
- ZUHZGEOKBKGPSW-UHFFFAOYSA-N tetraglyme Chemical compound COCCOCCOCCOCCOC ZUHZGEOKBKGPSW-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 229910052716 thallium Inorganic materials 0.000 description 1
- 238000012719 thermal polymerization Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- YRHRIQCWCFGUEQ-UHFFFAOYSA-N thioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3SC2=C1 YRHRIQCWCFGUEQ-UHFFFAOYSA-N 0.000 description 1
- 239000002733 tin-carbon composite material Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- KEROTHRUZYBWCY-UHFFFAOYSA-N tridecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCCOC(=O)C(C)=C KEROTHRUZYBWCY-UHFFFAOYSA-N 0.000 description 1
- DQWPFSLDHJDLRL-UHFFFAOYSA-N triethyl phosphate Chemical compound CCOP(=O)(OCC)OCC DQWPFSLDHJDLRL-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- NLVXSWCKKBEXTG-UHFFFAOYSA-N vinylsulfonic acid Chemical compound OS(=O)(=O)C=C NLVXSWCKKBEXTG-UHFFFAOYSA-N 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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Abstract
Description
아크릴계 공중합체 | 무기 입자: 유기 필러 | 코팅 두께 (㎛) | 접착력 (gf) | 수분도 (ppm) | BDV(kV) | 열수축 150℃, 1hr (MD/TD)(%) | |
실시예 1 | 합성예 1 | 95:5 | 2.0 | 9.7 | 425 | 1,245 | 4/3 |
실시예 2 | 합성예 1 | 90:10 | 2.0 | 10.4 | 399 | 1,297 | 3/2 |
실시예 3 | 합성예 1 | 80:20 | 2.0 | 13.7 | 371 | 1.314 | 3/4 |
실시예 4 | 합성예 1 | 75:25 | 2.0 | 15.5 | 353 | 1,359 | 4/3 |
실시예 5 | 합성예 1 | 50:50 | 2.0 | 20.3 | 312 | 1,494 | 4/4 |
비교예 1 | 합성예 1 | 100:0 (무기입자 단독) | 2.0 | 8.7 | 434 | 1.217 | 2/3 |
비교예 2 | 합성예 1 | 40:60 | 2.0 | 7.2 | 276 | 1.496 | 45/55 |
바인더 (구조단위의 몰%) |
기재 접착력 (gf) | 수분도 (ppm) | 열수축률 150℃, 1hr (MD/TD)(%) | |
실시예 2 | 합성예 1의 아크릴계 공중합체 | 10.4 | 399 | 3/2 |
비교예 3 | 폴리비닐알코올(PVA(100)) | 8.1 | 432 | 9/10 |
비교예 4 | 폴리비닐피롤리돈(PVP(100)) | 7.8 | 446 | 15/13 |
비교예 5 | 카르복시메틸 셀룰로오스(CMC(100)) | 7.3 | 481 | 11/11 |
비교예 6 | AA(20)/CMC(80) | 8.2 | 497 | 10/11 |
비교예 7 | AA(40)/CMC(20)/VP(40) | 8.6 | 458 | 12/9 |
비교예 8 | AA(100) | 9.5 | 423 | 16/14 |
112: 음극
113: 세퍼레이터
114: 양극
120: 전지 용기
140: 봉입 부재
Claims (14)
- 다공성 기재, 및
상기 다공성 기재의 적어도 일면에 위치하는 코팅층을 포함하고,
상기 코팅층은, (메타)아크릴아마이드로부터 유도되는 구조단위, 그리고 (메타)아크릴산 또는 (메타)아크릴레이트로부터 유도되는 구조단위, 및 (메타)아크릴아미도술폰산 또는 그 염으로부터 유도되는 구조단위를 포함하는 아크릴계 공중합체; 유기 필러; 및 무기 입자를 포함하며,
상기 (메타)아크릴아마이드로부터 유도되는 구조단위는 상기 아크릴계 공중합체 100 몰%에 대하여 80 몰% 내지 85 몰%로 포함되고, 상기 (메타)아크릴산 또는 (메타)아크릴레이트로부터 유도되는 구조단위는 상기 아크릴계 공중합체 100 몰%에 대하여 10 내지 15 몰%로 포함되며, 상기 (메타)아크릴아미도술폰산 또는 그 염으로부터 유도되는 구조단위는 상기 아크릴계 공중합체 100 몰%에 대하여 5 내지 10 몰%로 포함되고,
상기 유기 필러는, 아크릴레이트계 화합물 및 이의 유도체, 디알릴 프탈레이트계 화합물 및 이의 유도체, 폴리이미드계 화합물 및 이의 유도체, 이들의 공중합체 및 이들의 혼합물로부터 선택되는 적어도 하나의 유기 화합물이며, 상기 유기 필러 및 상기 무기 입자의 총량에 대하여 0.1 내지 50 중량%로 포함되며,
상기 무기 입자는 Al2O3, SiO2, TiO2, SnO2, CeO2, MgO, NiO, CaO, GaO, ZnO, ZrO2, Y2O3, SrTiO3, BaTiO3, Mg(OH)2, 보헤마이트(boehmite) 또는 이들의 조합을 포함하는 리튬 이차 전지용 분리막. - 제1항에서,
상기 무기 입자 및 상기 유기 필러의 부피비는 40 : 1 내지 1 : 3 인 리튬 이차 전지용 분리막. - 제1항에서,
상기 아크릴계 공중합체:유기 필러 및 무기 입자의 중량비는 1:20 내지 1:40인 리튬 이차 전지용 분리막. - 제1항에서,
상기 유기 필러의 평균 입경은 0.1 ㎛ 내지 0.5 ㎛인 리튬 이차 전지용 분리막. - 제1항에서,
상기 무기 입자의 평균 입경은 0.3 ㎛ 내지 0.7 ㎛인 리튬 이차 전지용 분리막. - 삭제
- 삭제
- 삭제
- 삭제
- 삭제
- 제1항에서,
상기 (메타)아크릴아마이드로부터 유도되는 구조단위는 하기 화학식 1로 표시되고,
상기 (메타)아크릴산 또는 (메타)아크릴레이트로부터 유도되는 구조단위는 하기 화학식 2, 화학식 3 및 이들의 조합 중 어느 하나로 표시되며,
상기 (메타)아크릴아미도술폰산 또는 그 염으로부터 유도되는 구조단위는 하기 화학식 4, 화학식 5, 화학식 6 및 이들의 조합 중 어느 하나로 표시되는, 리튬 이차 전지용 분리막:
[화학식 1]
[화학식 2] [화학식 3]
[화학식 4] [화학식 5] [화학식 6]
상기 화학식 1 내지 화학식 6에서,
R1 내지 R6은 각각 독립적으로 수소 또는 C1 내지 C6 알킬기이고,
R7은 치환 또는 비치환된 C1 내지 C20 알킬기이고,
L1 내지 L3은 각각 독립적으로 치환 또는 비치환된 C1 내지 C10 알킬렌기, 치환 또는 비치환된 C3 내지 C20 사이클로알킬렌기, 치환 또는 비치환된 C6 내지 C20 아릴렌기, 또는 치환 또는 비치환된 C3 내지 C20 헤테로고리기이고,
a, b 및 c는 각각 독립적으로 0 내지 2의 정수 중 하나이고,
M은 알칼리 금속이다. - 제1항에서,
상기 아크릴계 공중합체의 중량 평균 분자량은 350,000 내지 970,000인 리튬이차 전지용 분리막. - 제1항에서,
상기 코팅층의 두께는 1㎛ 내지 5㎛인 리튬 이차 전지용 분리막. - 양극, 음극, 및, 상기 양극과 상기 음극 사이에 위치하는 제1항 내지 제5항, 및 제11항 내지 제13항 중 어느 한 항에 따른 리튬 이차 전지용 분리막을 포함하는 리튬 이차 전지.
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KR1020190005932A KR102342669B1 (ko) | 2019-01-16 | 2019-01-16 | 리튬 이차 전지용 분리막 및 이를 포함하는 리튬 이차 전지 |
PCT/KR2019/009085 WO2020149478A1 (ko) | 2019-01-16 | 2019-07-23 | 리튬 이차 전지용 분리막 및 이를 포함하는 리튬 이차 전지 |
CN201980087908.1A CN113261152A (zh) | 2019-01-16 | 2019-07-23 | 用于锂二次电池的隔板和包括其的锂二次电池 |
EP19910153.6A EP3913703A4 (en) | 2019-01-16 | 2019-07-23 | SEPARATOR FOR SECONDARY LITHIUM BATTERY, AND SECONDARY LITHIUM BATTERY INCLUDING IT |
US17/414,043 US12230834B2 (en) | 2019-01-16 | 2019-07-23 | Separator including porous substrate and coating layer of acrylic copolymer, organic filler, and inorganic particles, and lithium secondary battery including the same |
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KR102306447B1 (ko) | 2018-12-26 | 2021-09-28 | 삼성에스디아이 주식회사 | 리튬 이차 전지용 분리막 및 이를 포함하는 리튬 이차 전지 |
KR102306446B1 (ko) | 2018-12-28 | 2021-09-28 | 삼성에스디아이 주식회사 | 리튬 이차 전지용 분리막 및 이를 포함하는 리튬 이차 전지 |
KR102342671B1 (ko) | 2019-01-04 | 2021-12-22 | 삼성에스디아이 주식회사 | 리튬 이차 전지용 분리막 및 이를 포함하는 리튬 이차 전지 |
KR102416526B1 (ko) | 2019-06-07 | 2022-07-01 | 삼성에스디아이 주식회사 | 리튬 이차 전지용 분리막 및 이를 포함하는 리튬 이차 전지 |
-
2019
- 2019-01-16 KR KR1020190005932A patent/KR102342669B1/ko active Active
- 2019-07-23 WO PCT/KR2019/009085 patent/WO2020149478A1/ko unknown
- 2019-07-23 EP EP19910153.6A patent/EP3913703A4/en active Pending
- 2019-07-23 CN CN201980087908.1A patent/CN113261152A/zh active Pending
- 2019-07-23 US US17/414,043 patent/US12230834B2/en active Active
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CN113261152A (zh) | 2021-08-13 |
WO2020149478A1 (ko) | 2020-07-23 |
EP3913703A4 (en) | 2023-01-04 |
US12230834B2 (en) | 2025-02-18 |
EP3913703A1 (en) | 2021-11-24 |
KR20200089178A (ko) | 2020-07-24 |
US20220052419A1 (en) | 2022-02-17 |
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