KR20160015768A - 전기화학소자용 세퍼레이터의 제조방법, 그로부터 제조된 세퍼레이터 및 그를 포함하는 전기화학소자 - Google Patents
전기화학소자용 세퍼레이터의 제조방법, 그로부터 제조된 세퍼레이터 및 그를 포함하는 전기화학소자 Download PDFInfo
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- KR20160015768A KR20160015768A KR1020140098455A KR20140098455A KR20160015768A KR 20160015768 A KR20160015768 A KR 20160015768A KR 1020140098455 A KR1020140098455 A KR 1020140098455A KR 20140098455 A KR20140098455 A KR 20140098455A KR 20160015768 A KR20160015768 A KR 20160015768A
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- Prior art keywords
- separator
- inorganic particles
- electrochemical device
- coating layer
- engineering plastic
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Abstract
본 발명의 제조방법을 통해 제조된 세퍼레이터는 기존의 일반적인 다공성 고분자 기재와 비교하여 통기성은 크게 상승되지 않고, 엔지니어링 플라스틱으로 형성된 다공성의 코팅층을 포함함으로써 내열성이 향상된다.
Description
도 1은 본 발명의 일 실시예에 따라 제조된 다공성 고분자 기재의 적어도 일면에 형성된 코팅층의 단면을 나타낸 SEM 사진이다.
도 2는 도 1의 코팅층에 포함된 무기물 입자를 선택적으로 추출하여 제조된 다공성의 코팅층의 단면을 나타낸 SEM 사진이다.
Claims (15)
- (S1) 다공성 고분자 기재를 마련하는 단계;
(S2) 엔지니어링 플라스틱, 무기물 입자 및 상기 엔지니어링 플라스틱을 용해시키면서, 상기 무기물 입자를 분산시키는 극성용매를 포함하는 혼합 용액을 상기 다공성 고분자 기재의 적어도 일면에 코팅한 후, 상기 극성용매를 건조시켜 코팅층을 형성하는 단계; 및
(S3) 불산(hydrofluoric acid)을 이용하여, 상기 코팅층에 포함된 상기 무기물 입자를 선택적으로 추출하여 다공성의 코팅층을 형성하는 단계;를 포함하는 전기화학소자용 세퍼레이터의 제조방법. - 제1항에 있어서,
상기 다공성의 코팅층에 형성된 기공은, 상기 코팅층 중 상기 무기물 입자가 이루고 있던 공간으로, 상기 무기물 입자가 추출되면서 형성되는 기공인 것을 특징으로 하는 전기화학소자용 세퍼레이터의 제조방법. - 제1항에 있어서,
상기 (S3) 단계는, 상기 불산을 포함하는 수용액에, 상기 코팅층이 형성된 다공성 고분자 기재를 침지시켜, 상기 무기물 입자를 선택적으로 추출하는 것을 특징으로 하는 전기화학소자용 세퍼레이터의 제조방법. - 제3항에 있어서,
상기 침지는, 4 내지 8 시간 동안 이루어지는 것을 특징으로 하는 전기화학소자용 세퍼레이터의 제조방법. - 제3항에 있어서,
상기 불산을 포함하는 수용액 중, 불산의 농도는 5 내지 20 중량%인 것을 특징으로 하는 전기화학소자용 세퍼레이터의 제조방법. - 제1항에 있어서,
상기 다공성 고분자 기재는, 고밀도 폴리에틸렌, 저밀도 폴리에틸렌, 선형저밀도 폴리에틸렌, 초고분자량 폴리에틸렌, 폴리프로필렌, 폴리에틸렌 테레프탈레이트, 폴리부틸렌 테레프탈레이트, 폴리에스테르, 폴리아세탈, 폴리아미드, 폴리카보네이트, 폴리이미드, 폴리에테르에테르케톤, 폴리에테르설폰, 폴리페닐렌옥사이드, 폴리페닐렌설파이드 및 폴리에틸렌나프탈렌으로 이루어진 군으로부터 선택되는 어느 하나 또는 이들 중 2종 이상의 혼합물로 형성된 것을 특징으로 하는 전기화학소자용 세퍼레이터의 제조방법. - 제1항에 있어서,
상기 혼합 용액은, 상기 엔지니어링 플라스틱 1 내지 50 중량%, 상기 무기물 입자 1 내지 50 중량% 및 상기 극성용매 49 내지 98 중량%로 이루어진 것을 특징으로 하는 전기화학소자용 세퍼레이터의 제조방법. - 제1항에 있어서,
상기 엔지니어링 플라스틱은, 녹는점이 200 ℃ 이상인 것을 특징으로 하는 전기화학소자용 세퍼레이터의 제조방법. - 제1항에 있어서,
상기 엔지니어링 플라스틱은, 폴리에테르이미드(PEI), 폴리아미드이미드(PAI), 폴리아미드(PA), 폴리아세탈(POM), 폴리카보네이트(PC), 변성 폴리페닐렌옥사이드(MPPO) 및 폴리부틸렌테레프탈레이트(PBT)로 이루어진 군으로부터 선택되는 어느 하나 또는 이들 중 2종 이상의 혼합물인 것을 특징으로 하는 전기화학소자용 세퍼레이터의 제조방법. - 제1항에 있어서,
상기 무기물 입자는, SiO2인 것을 특징으로 하는 전기화학소자용 세퍼레이터의 제조방법. - 제1항에 있어서,
상기 무기물 입자의 평균 입경은, 0.01 ㎛ 내지 10 ㎛인 것을 특징으로 하는 전기화학소자용 세퍼레이터의 제조방법. - 제1항에 있어서,
상기 극성용매는, N,N-디메틸아세트아마이드(DMAc), N-메틸-2-피롤리돈(NMP), 메틸렌클로라이드(MC), 클로로포름(CF) 및 N,N-디메틸포름아마이드로 이루어진 군으로부터 선택되는 어느 하나 또는 이들 중 2종 이상의 혼합물인 것을 특징으로 하는 전기화학소자용 세퍼레이터의 제조방법. - 제1항 내지 제12항 중 어느 한 항의 제조방법에 의해 제조된 전기화학소자용 세퍼레이터.
- 캐소드, 애노드, 상기 캐소드와 상기 애노드 사이에 개재된 세퍼레이터 및 비수 전해액을 포함하는 전기화학소자에 있어서,
상기 세퍼레이터는, 제13항의 전기화학소자용 세퍼레이터인 것을 특징으로 하는 전기화학소자. - 제14항에 있어서,
상기 전기화학소자는, 리튬 이차전지인 것을 특징으로 하는 전기화학소자.
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020140098455A KR20160015768A (ko) | 2014-07-31 | 2014-07-31 | 전기화학소자용 세퍼레이터의 제조방법, 그로부터 제조된 세퍼레이터 및 그를 포함하는 전기화학소자 |
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| KR1020140098455A KR20160015768A (ko) | 2014-07-31 | 2014-07-31 | 전기화학소자용 세퍼레이터의 제조방법, 그로부터 제조된 세퍼레이터 및 그를 포함하는 전기화학소자 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109742298A (zh) * | 2019-01-08 | 2019-05-10 | 桑顿新能源科技有限公司 | 多孔陶瓷隔膜浆料及其制备方法、电池隔膜及电池 |
| WO2019225868A1 (ko) * | 2018-05-25 | 2019-11-28 | 주식회사 엘지화학 | 분리막 제조용 수지 조성물, 이의 제조방법 및 이를 포함하는 전지 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019225868A1 (ko) * | 2018-05-25 | 2019-11-28 | 주식회사 엘지화학 | 분리막 제조용 수지 조성물, 이의 제조방법 및 이를 포함하는 전지 |
| US11322796B2 (en) | 2018-05-25 | 2022-05-03 | Lg Chem, Ltd. | Resin composition for manufacturing separator, preparation method therefor, and battery comprising same |
| CN109742298A (zh) * | 2019-01-08 | 2019-05-10 | 桑顿新能源科技有限公司 | 多孔陶瓷隔膜浆料及其制备方法、电池隔膜及电池 |
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