KR100963274B1 - 미세다공층을 포함하는 가스확산층과 그 제조방법 - Google Patents
미세다공층을 포함하는 가스확산층과 그 제조방법 Download PDFInfo
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- KR100963274B1 KR100963274B1 KR1020070134829A KR20070134829A KR100963274B1 KR 100963274 B1 KR100963274 B1 KR 100963274B1 KR 1020070134829 A KR1020070134829 A KR 1020070134829A KR 20070134829 A KR20070134829 A KR 20070134829A KR 100963274 B1 KR100963274 B1 KR 100963274B1
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- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/023—Porous and characterised by the material
- H01M8/0241—Composites
- H01M8/0245—Composites in the form of layered or coated products
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- H—ELECTRICITY
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- H01M8/00—Fuel cells; Manufacture thereof
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- H01M8/0234—Carbonaceous material
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- H01M8/00—Fuel cells; Manufacture thereof
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- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/023—Porous and characterised by the material
- H01M8/0239—Organic resins; Organic polymers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
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Abstract
Description
탄소충전제 미세분말 (wt.%) |
플루오르화 비닐리덴 (wt.%) |
N-메틸-2-피롤리딘 (g) |
점도 (cps) |
두께 (mm) |
무게 (g) |
|
시료 1 | 60(195.4g) | 40(130.6g) | 90 | 11500 | 0.1357 | 0.1792 |
시료 2 | 50(163g) | 50(163g) | 50 | 11900 | 0.1147 | 0.1612 |
시료 3 | 40(130.4g) | 60(195.4g) | 50 | 11600 | 0.1327 | 0.1737 |
플루오르화 비닐리덴(g) | 탄소충전제 미세분말(wt.%) | 점도(cps) | |
시료 4 | 100 | 40(4g) | 13000 |
시료 5 | 100 | 50(5g) | 30000 |
시료 6 | 100 | 60(6g) | 100000 |
시료 7 | 100 | 70(7g) | 200000 이상 고점도 |
시료 8 | 100 | 80(8g) | 200000 이상 고점도 |
Claims (15)
- 연료전지의 반응가스를 촉매 층으로 골고루 이동시키고, 생성된 물을 외부로 배출시키는 가스확산층에 있어서,상기 가스확산층은 플루오르화 비닐리덴(polyvinylidene fluoride) 44.5 내지 28.6wt.%와 탄소충전제 미세분말 55.5wt.% 내지 71.4wt.%를 혼합하여 점도가 200,000cps 이상인 슬러리 제조하고, 상기 슬러리를 탄소천(carbon cloth)에 코팅하여 이루어진 미세다공층을 포함하는 가스확산층.
- 삭제
- 제 1 항에 있어서,상기 미세다공층의 코팅두께가 50 내지 130㎛인 것을 특징으로 하는 미세다공층을 포함하는 가스확산층.
- 제 3 항에 있어서,상기 가스확산층은, 상기 미세다공층에 플루오르화 비닐리덴과 탄소충전제 미세분말을 무게비 60wt.% 내지 40wt.% : 40wt.% 내지 60wt.%로 혼합되고, 상기 플루오르화 비닐리덴과 탄소충전제 미세분말의 총혼합량에 대해서 NMP(N-methyl-2-Pyrrolidone)를 13~22 wt% 더 첨가하여 제조되는 저점도 슬러리로 반복코팅하여 다수의 코팅층이 형성되는 것을 특징으로 하는 미세다공층을 포함하는 가스확산층.
- 제 1 항에 있어서,상기 탄소충전제의 미세분말은 입자의 평균 크기가 25 내지 50㎛ 인 것을 특징으로 하는 가스확산층.
- 연료전지의 반응가스를 촉매 층으로 골고루 이동시키고, 생성된 물을 외부로 배출시키는 가스확산층의 제조방법에 있어서,상기 가스확산층의 제조방법은 이소프로필 알코올과 폴리테트라플루오르에틸렌(polytetrafluoroethylene; PTFE) 에멀젼 혼합용액을 탄소천(carbon cloth)에 함침시키는 에멀젼 혼합용액 함침단계;상기 에멀젼 혼합용액에 함침된 탄소천을 폴리테트라플루오르에틸렌(polytetrafluoroethylene)에 함침시키는 폴리테트라플루오르에틸렌 함침단계;상기 폴리테트라플루오르에틸렌에 함침한 탄소천을 실온에서 건조시키는 건조단계;상기 건조된 탄소천을 건조기에서 소결시키는 소결단계; 및상기 소결된 탄소천을 플루오르화 비닐리덴(polyvinylidene fluoride)과 탄 소충전제 미세분말을 혼합하여 만들어진 슬러리로 코팅하는 슬러리 코팅단계;를 포함하여 이루어지는 미세다공층을 포함하는 가스확산층의 제조방법.
- 제 6 항에 있어서,상기 폴리테트라플루오르에틸렌 에멀젼은 폴리테트라플루오르에틸렌을 증류수에 혼합시켜서 만들고, 상기 폴리테트라플루오르에틸렌 에멀젼의 농도가 30wt.% 인 것을 특징으로 하는 미세다공층을 포함하는 가스확산층의 제조방법.
- 제 6 항에 있어서,상기 폴리테트라플루오르에틸렌 함침단계는 탄소천을 플루오르화 비닐리덴(polyvinylidene fluoride)에 함침하여 상기 탄소천의 무게의 증가율이 3wt.%인 것을 특징으로 하는 미세다공층을 포함하는 가스확산층의 제조방법.
- 제 6 항에 있어서,상기 소결단계는 건조기 내의 온도가 350℃이고, 건조시간은 1시간의 조건으로 이루어지는 것을 특징으로 하는 미세다공층을 포함하는 가스확산층의 제조방법.
- 제 6 항에 있어서,상기 슬러리는 플루오르화 비닐리덴(polyvinylidene fluoride)과 탄소충전제 미세분말을 혼합하고 분쇄하는 혼합단계;상기 혼합된 플루오르화 비닐리덴(polyvinylidene fluoride)과 탄소충전제 미세분말을 교반하는 교반단계; 및상기 교반단계 후 실온에서 2시간 동안 방치시켜 상기 교반단계로 인하여 생성된 기포를 제거하는 기포제거단계;를 포함하는 것을 특징으로 하는 미세다공층을 포함하는 가스확산층의 제조방법.
- 제 6 항 또는 제 10 항에 있어서,상기 슬러리는 플루오르화 비닐리덴(polyvinylidene fluoride) 44.5 내지 28.6wt.%와 탄소충전제 미세분말 55.5wt.% 내지 71.4wt.%를 포함하고, 상기 슬러리의 점도가 200,000cps 이상인 것을 특징으로 하는 미세다공층을 포함하는 가스확산층의 제조방법.
- 제 10 항에 있어서,상기 교반단계는 혼합된 플루오르화 비닐리덴(polyvinylidene fluoride)과 탄소충전제 미세분말을 500 내지 700rpm의 속도로 20분간 이루어지는 것을 특징으로 하는 미세다공층을 포함하는 가스확산층의 제조방법.
- 제 10 항에 있어서,상기 혼합단계는 플루오르화 비닐리덴(polyvinylidene fluoride)과 탄소충전제 미세분말의 혼합물을 2000rpm의 속도로 10분간 이루어지는 것을 특징으로 하는 미세다공층을 포함하는 가스확산층의 제조방법.
- 제 6 항에 있어서,상기 코팅은 롤코팅으로 코팅하는 것으로, 코팅의 두께가 50 내지 130㎛인 것을 특징으로 하는 미세다공층을 포함하는 가스확산층의 제조방법.
- 제 14 항에 있어서,상기 가스확산층은, 상기 미세다공층에 플루오르화 비닐리덴과 탄소충전제 미세분말을 무게비 60wt.% 내지 40wt.% : 40wt.% 내지 60wt.%로 혼합되고, 상기 플루오르화 비닐리덴과 탄소충전제 미세분말의 총혼합량에 대해서 NMP(N-methyl-2-Pyrrolidone)를 13~22 wt% 더 첨가하여 제조되는 저점도 슬러리로 반복코팅하여 다수의 코팅층이 형성되는 것을 특징으로 하는 미세다공층을 포함하는 가스확산층의 제조방법.
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KR20220117593A (ko) | 2021-02-17 | 2022-08-24 | 광운대학교 산학협력단 | 미세기공 구조를 가진 자가지지형 기체확산층 및 이를 포함하는 연료전지 |
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KR20120134460A (ko) | 2011-06-02 | 2012-12-12 | 삼성전자주식회사 | 촉매 슬러리, 이를 사용하여 제조된 전극 및 상기 전극을 구비하는 연료전지 |
KR20210074896A (ko) * | 2019-12-12 | 2021-06-22 | 현대자동차주식회사 | 연료전지용 기체확산층 및 그 제조방법 |
CN112820883B (zh) * | 2020-12-31 | 2022-03-08 | 武汉理工氢电科技有限公司 | 一种微孔层浆料、气体扩散层、燃料电池及制备方法 |
CN115084540B (zh) * | 2021-03-10 | 2025-03-21 | 上海大学 | 一种具有亲水微孔层的气体扩散电极及其制备方法和应用 |
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