KR102155696B1 - 복합막, 그 제조방법 및 이를 포함한 리튬 공기 전지 - Google Patents
복합막, 그 제조방법 및 이를 포함한 리튬 공기 전지 Download PDFInfo
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Abstract
Description
도 5a는 일구현예에 따른 리튬 공기 전지의 구조를 개략적으로 나타낸 도면이다.
도 5b는 일구현예에 따른 리튬 이차 전지의 구조를 개략적으로 나타낸 도면이다.
도 6은 실시예 1에 따라 제조된 복합막의 표면에 대한 전자주사현미경 사진이다.
도 7은 실시예 1에 따라 제조된 복합막의 표면에 대한 전자주사현미경 사진이다.
도 8은 실시예 1에서 연마를 실시하기 이전의 복합막 단면에 대한 전자주사현미경 사진이다.
도 9는 실시예 1에서 복합막에서 연마한 후의 복합막 단면에 대한 전자주사현미경 사진이다.
도 10a은 제작예 1-3의 복합막의 임피던스 특성을 나타낸 그래프이다.
도 10b는 제작예 1-3의 복합막 및 비교제작예 1에 따른 막 구조체의 임피던스 특성을 나타낸 그래프이다.
도 11은 평가예 4에 따른 대칭 스웨이지 락형(swage-lock type) 전지 A를 형성하기 위한 전지 구조체의 구조를 나타낸 도면이다.
도 12는 평가예 4에 따른 대칭 스웨이지 락형 전지 B를 형성하기 위한 전지 구조체의 구조를 나타낸 도면이다.
도 13은 평가예 4에 따른 스웨이지 락형 전지의 구성을 나타낸 도면이다.
도 14는 평가예 4에 따른 스웨이지 락형 테스트 전지 A 및 B에 있어서, 시간 경과에 따른 저항 특성 변화를 나타낸 그래프이다.
도 15는 평가예 4에 따른 스웨이지 락형 테스트 전지 A의 임피던스 특성을 나타낸 것이다.
도 16은 평가예 4에 따른 스웨이지 락형 테스트 전지 B의 임피던스 특성을 나타낸 것이다.
도 17은 비교예 5에 따른 막 구조체의 전자주사현미경 사진이다.
도 18은 제작예 6에 따라 제조된 전지 구조체의 단면을 나타낸 것이다.
도 19는 제작예 6에 따라 제조된 리튬공기전지에 있어서, 용량에 따른 전압 변화를 나타낸 것이다.
도 20은 제작예 6에 따라 제조된 리튬공기전지에 있어서, 사이클 특성을 나타낸 것이다.
| 구분 | 조성 | 막 두께(㎛) | 저항 (Ω) |
| 실시예 1 | PVA-LTAP | 70 | 4.8x102 |
| 실시예 2 | PVA-LTAP | 100 | 6.5x102 |
| 실시예 3 | PVA-LTAP | 120 | 1.7x103 |
| 실시예 4 | 에폭시 수지-LTAP | 70 | 6.6x103 |
| 비교예 1 | LTAP | 260 | 9.2x102 |
| 비교예 2 | PVA | 100 | 3.1x109 |
| 비교예 3 | PVA/LTAP | 300 | 6.0x109 |
| 비교예 4 | PVA-LTAP | 70 | 측정 불가 |
| 구분 | 조성 | 막 두께(㎛) | 중량(mg/cm2) |
| 실시예 1 | PVA-LTAP | 70 | 11 |
| 실시예 2 | PVA-LTAP | 100 | 16 |
| 비교예 1 | LTAP | 260 | 88 |
| 비교예 2 | PVA | 100 | 7 |
53, 62: 음극 54, 56: 전해질
10, 20, 30, 55: 복합막 57, 63: 양극
62: 세퍼레이터 65: 전지 케이스
Claims (21)
- 이온 전도성 무기물 입자와 고분자막을 포함하며,
상기 이온 전도성 무기물 입자가 고분자막을 관통하고 있고,
상기 이온 전도성 무기물 입자는 입자간 경계가 없는 단일 입자 상태를 갖는 복합막. - 제1항에 있어서,
상기 이온 전도성 무기물 입자는 리튬 이온 전도성 무기물 입자인 복합막. - 삭제
- 제1항에 있어서,
상기 이온 전도성 무기물 입자는 BaTiO3, Pb(Zr,Ti)O3(PZT), Pb1-xLaxZr1-y TiyO3(PLZT)(O≤x<1, O≤y<1),PB(Mg3Nb2/3)O3-PbTiO3(PMN-PT), HfO2, SrTiO3, SnO2, CeO2, Na2O, MgO, NiO, CaO, BaO, ZnO, ZrO2, Y2O3, Al2O3, TiO2, SiO2, SiC, 리튬포스페이트(Li3PO4), 리튬티타늄포스페이트(LixTiy(PO4)3,0<x<2, 0<y<3), 리튬알루미늄티타늄포스페이트 (LixAlyTiz(PO4)3, 0<x<2, 0<y<1, 0<z<3), Li1+x+y(Al, Ga)x(Ti, Ge)2-xSiyP3-yO12(O≤x≤1, O≤y≤1), 리튬란탄티타네이트(LixLayTiO3, 0<x<2, 0<y<3), 리튬게르마늄티오포스페이트(LixGeyPzSw, 0<x<4, 0<y<1, 0<z<1, 0<w<5), 리튬나이트라이드(LixNy, 0<x<4, 0<y<2), SiS2(LixSiySz, 0<x<3, 0<y<2, 0<z<4) 계열 글래스, P2S5(LixPySz, 0<x<3, 0<y<3, 0<z<7) 계열 글래스, Li2O, LiF, LiOH, Li2CO3, LiAlO2, Li2O-Al2O3-SiO2-P2O5-TiO2-GeO2계 세라믹스, 가넷(Garnet)계 세라믹스 Li3+xLa3M2O12(M = Te, Nb, 또는 Zr)중에서 선택된 하나 이상 또는 이들의 조합물을 포함하는 복합막. - 제1항에 있어서,
상기 이온 전도성 무기 입자가 LTAP(Li1 .4Ti1 .6Al0 .4P3O12) 또는 Li2O-Al2O3-SiO2-P2O5-TiO2-GeO2 계 세라믹스인 복합막 - 제1항에 있어서,
상기 이온 전도성 무기물 입자의 평균 입경이 10 내지 300㎛인 복합막. - 제1항에 있어서,
상기 고분자가 가스 및 수분 중에서 선택된 하나 이상을 차단하는 배리어 특성을 갖는 고분자인 복합막. - 제1항에 있어서,
상기 고분자가 폴리 2-비닐피리딘, 폴리테트라플루오로에틸렌, 테트라플루오로에틸렌-헥사플루오로프로필렌 공중합체, 폴리클로로트리플루오로에틸렌, 퍼플루오로알콕시 공중합체, 불소화된 싸이클릭 에테르, 폴리에틸렌옥사이드 디아크릴레이트, 폴리에틸렌옥사이드 디메타크릴레이트, 폴리프로필렌옥사이드 디아크릴레이트, 폴리프로필렌옥사이드 디메타크릴레이트, 폴리메틸렌옥사이드 디아크릴레이트, 폴리메틸렌옥사이드 디메타크릴레이트, 폴리알킬디올디아크릴레이트, 폴리알킬디올디메타크릴레이트, 폴리디비닐벤젠, 폴리에테르, 폴리카보네이트, 폴리아미드, 폴리에스테르, 폴리비닐클로라이드, 폴리이미드, 폴리카르복실산, 폴리술폰산, 폴리비닐알코올, 폴리설폰, 폴리스티렌, 폴리에틸렌, 폴리프로필렌, 폴리(p-페닐렌), 폴리아세틸렌, 폴리(p-페닐렌 비닐렌), 폴리아닐린, 폴리피롤, 폴리티오펜, 폴리(2,5-에틸렌 비닐렌), 폴리아센, 및 폴리(나프탈렌-2,6-디일), 폴리에틸렌 옥사이드, 폴리프로필렌 옥사이드, 폴리비닐리덴 플루오라이드, 비닐리덴 플루오라이드와 헥사플루오로프로필렌의 코폴리머, 폴리(비닐아세테이트), 폴리(비닐 부티랄-코-비닐 알콜-코-비닐 아세테이트), 폴리(메틸메타크릴레이트-코-에틸 아크릴레이트), 폴리아크릴로니트릴, 폴리비닐 클로라이드 코-비닐 아세테이트, 폴리(1-비닐피롤리돈-코-비닐 아세테이트), 폴리비닐피롤리돈, 폴리아크릴레이트, 폴리메타크릴레이트, 폴리우레탄, 폴리비닐에테르, 아크릴로니트릴-부타디엔 러버, 스티렌-부타디엔 러버, 아크릴로니트릴-부타디엔-스티렌 러버, 설포네이티드 스티렌/에틸렌-부틸렌 트리블럭 코폴리머, 에톡실레이티드 네오펜틸 글리콜 디아크릴레이트, 에톡실레이티드 비스페놀 A 디아크릴레이트, 에톡실레이티드 지방족 우레탄 아크릴레이트, 에톡실레이티드 알킬페놀 아크릴레이트 및 알킬아크릴레이트로 이루어진 군에서 선택되는 하나 이상의 아크릴레이트 모노머로부터 얻어진 고분자, 폴리비닐알콜, 폴리이미드, 에폭시 수지 및 아크릴계 수지 중에서 선택된 하나 이상 또는 그 조합물인 복합막. - 제1항에 있어서,
상기 고분자가 폴리비닐알콜, 폴리아크릴로니트릴, 폴리이미드, 에폭시 수지, 아크릴계 수지 또는 폴리에틸렌인 복합막. - 제1항에 있어서,
상기 고분자의 함량이 복합막 총중량 100 중량부를 기준으로 하여 50 내지 80 중량부인 복합막. - 제1항에 있어서,
상기 복합막의 산소 투과도가 5x108 내지 2x1013 cm3 cm/cm2 s Pa인 복합막. - 제1항에 있어서,
상기 복합막의 저항이 1×102 내지 9×104Ω인 복합막. - 제1항에 있어서,
상기 복합막의 두께가 10 내지 200㎛인 복합막. - 제1항에 있어서,
다공성 기재를 더 포함하는 복합막. - 제14항에 있어서,
상기 다공성 기재가 폴리에틸렌막, 폴리프로필렌막 또는 그 조합물인 복합막. - 박리성 필름 상에 이온 전도성 무기물 입자를 고정하는 단계;
상기 이온 전도성 무기물 입자가 고정된 박리성 필름 상부에 고분자막을 형성하는 단계; 및
상기 결과물로부터 박리성 필름을 제거하는 단계;를 포함하여 제1항, 제2항, 제4항 내지 제15항 중 어느 한 항의 복합막을 얻는 복합막의 제조방법. - 제16항에 있어서,
상기 박리성 필름이 제거된 결과물을 연마하는 단계를 더 포함하는 복합막의 제조방법. - 제16항에 있어서,
상기 박리성 필름이 표면에 접착층을 갖고 있는 고분자막인 복합막의 제조방법. - 제16항에 있어서,
상기 고분자막을 형성하는 단계는 고분자 및 고분자 형성용 모노머 중에서 선택된 하나 및 용매를 포함하는 고분자막 형성용 조성물을 도포하는 단계인 복합막의 제조방법. - 제16항에 있어서,
상기 박리성 필름 상에 이온 전도성 무기물 입자를 고정하는 단계가,
박리성 필름 상에 이온 전도성 무기물 입자를 제공하는 단계 및
상기 박리성 필름 상에 제공된 이온 전도성 무기물 입자에 압력을 가하는 단계를 포함하는 복합막의 제조방법. - 제1항, 제2항, 제4항 내지 제15항 중 어느 한 항의 복합막을 포함하는 리튬 공기 전지.
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| US14/296,690 US9911957B2 (en) | 2013-09-13 | 2014-06-05 | Composite membrane, preparation method thereof, and lithium-air battery including the composite membrane |
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| US10833308B2 (en) | 2020-11-10 |
| US9911957B2 (en) | 2018-03-06 |
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| US20180145297A1 (en) | 2018-05-24 |
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| US20180145296A1 (en) | 2018-05-24 |
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