KR20210085624A - 촉매의 피독을 방지할 수 있는 연료전지용 전해질막 및 이의 제조방법 - Google Patents
촉매의 피독을 방지할 수 있는 연료전지용 전해질막 및 이의 제조방법 Download PDFInfo
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Abstract
Description
도 2는 본 발명에 따른 전해질막의 일 실시형태를 도시한 것이다.
도 3a는 본 발명에 따른 촉매 복합체의 일 예를 도시한 것이다.
도 3b는 본 발명에 따른 촉매 복합체의 다른 예를 도시한 것이다.
도 4는 보호층이 존재하지 않는 경우 전해질막에 포함된 촉매 금속이 피독되는 것을 도시한 것이다.
도 5는 본 발명과 같이 보호층을 형성한 경우 전해질막에 포함된 촉매 금속의 피독이 방지되는 것을 도시한 것이다.
도 6 내지 도 8은 각각 본 발명에 따른 전해질막의 변형된 형태를 도시한 것이다.
400: 이온전달층 410: 이오노머 500: 촉매 복합체
510: 촉매 입자 511: 촉매 금속 512: 지지체
520: 보호층 600: 강화층 700: 이오노머층
Claims (16)
- 수소 이온 전도성이 있는 이오노머를 포함하는 이온전달층; 및
상기 이온전달층 내에 분산되어 있는 촉매 복합체;를 포함하고,
상기 촉매 복합체는 과산화수소 분해 활성이 있는 촉매 금속을 포함하는 촉매 입자; 및 상기 촉매 입자의 표면의 적어도 일부에 형성되어 상기 이오노머와 상기 촉매 금속이 접촉하는 것을 방지하는 보호층;을 포함하는 것인 연료전지용 전해질막. - 제1항에 있어서,
상기 이오노머는 수소 이온 전도성 작용기를 포함하는 것인 연료전지용 전해질막. - 제1항에 있어서,
상기 촉매 입자는 지지체 없이 촉매 금속으로 이루어진 것을 포함하는 연료전지용 전해질막. - 제1항에 있어서,
상기 촉매 입자는 촉매 금속이 지지체 상에 담지된 것을 포함하는 연료전지용 전해질막. - 제1항에 있어서,
상기 촉매 금속은 백금(Pt), 금(Au), 팔라듐(Pd), 은(Ag), 오스뮴(Os), 이리듐(Ir), 루테늄(Ru) 및 이들의 조합으로 이루어진 군으로부터 선택된 것을 포함하는 연료전지용 전해질막. - 제4항에 있어서,
상기 지지체는 탄소; 실리카; 제올라이트; 4B족, 5B족, 6B족, 7B족 및 8B족으로 이루어진 군으로부터 선택된 전이금속 또는 이의 산화물 또는 탄화물; 및 이들의 조합으로 이루어진 군으로부터 선택된 것을 포함하는 연료전지용 전해질막. - 제1항에 있어서,
상기 보호층은
측쇄(Side Chain)에 수소 이온 전도성 작용기가 없고,
주쇄(Main Chain)에 이온성 그룹이 없는 고분자를 포함하는 연료전지용 전해질막. - 제1항에 있어서,
상기 보호층은 상기 이오노머와 상용성이 없는 것인 연료전지용 전해질막. - 제1항에 있어서,
상기 보호층은 기체 투과도(Gas Permeability)가 10 Barrer 이상인 고분자를 포함하는 연료전지용 전해질막. - 제1항에 있어서,
상기 보호층은
자유 부피(Free Volume)가 0.20 이상인;
폴리아세틸렌계 고분자, 노보넨계 고분자, 불소탄화수소계 고분자, 내재적 기공성 고분자(Polymer of Intrinsic Microporosity, PIM-1) 및 이들의 치환체 또는 유도체로 이루어진 군으로부터 선택된 고분자를 포함하는 연료전지용 전해질막. - 제10항에 있어서,
상기 폴리아세틸렌계 고분자는 폴리(1-(트리메틸실릴)-1-프로파인)(Poly(1-(trimethylsilyl)-1-propyne), PTMSP), 폴리(4-메틸-2-펜타인)(Poly(4-methyl-2-pentyne), PMP), 폴리(tert-부틸아세틸렌)(Poly(tert-butylacetylene), PTBA), 폴리(1-페닐-1-프로파인)(Poly(1-phenyl-1-propyne), PPP) 및 이들의 조합으로 이루어진 군으로부터 선택된 것을 포함하고,
상기 노보넨계 고분자는 폴리(트리메틸실릴)노보넨(poly(trimethylsilyl norbornene, PTMSN)을 포함하며,
상기 불소탄화수소계 고분자는 폴리[4,5-디플루오로-2,2-비스(트리플루오로메틸)]1,3-다이옥솔-co-테트라플루오로에틸렌(Poly[4,5-difluoro-2,2-bis(trifluoromethyl)-1,3-dioxole-co-tetrafluoroethylene])을 포함하는 것인 연료전지용 전해질막. - 제1항에 있어서,
상기 전해질막은 상기 촉매 복합체를 0.01mg/cm2 내지 0.90mg/cm2의 함량으로 포함하는 것인 연료전지용 전해질막. - 제1항에 있어서,
상기 전해질막은 강화층을 포함하고,
상기 강화층의 적어도 일면에 상기 이온전달층이 구비되는 것인 연료전지용 전해질막. - 과산화수소 분해 활성이 있는 촉매 금속을 포함하는 촉매 입자 및 상기 촉매 입자의 표면의 적어도 일부에 형성된 보호층을 포함하는 촉매 복합체를 제조하는 단계;
상기 촉매 복합체를 이오노머와 혼합하여 분산액을 제조하는 단계; 및
상기 분산액을 도포하여 이온전달층을 형성하는 단계;를 포함하는 제1항 내지제13항 중 어느 한 항의 연료전지용 전해질막의 제조방법. - 제14항에 있어서,
상기 촉매 복합체는 상기 촉매 입자 및 상기 보호층을 구성하는 고분자 재료를 혼합하여 얻은 혼합물을 80℃ 내지 300℃에서 건조하여 제조하는 것인 연료전지용 전해질막의 제조방법. - 제14항에 있어서,
상기 분산액을 강화층의 적어도 일면 상에 도포하여 이온전달층을 형성하는 것인 연료전지용 전해질막의 제조방법.
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DE102020214165.7A DE102020214165A1 (de) | 2019-12-31 | 2020-11-11 | Elektrolytmembran für brennstoffzellen, die zum verhindern einer katalysatorvergiftung fähig ist, und verfahren zum herstellen derselben |
US17/095,317 US11355768B2 (en) | 2019-12-31 | 2020-11-11 | Electrolyte membrane for fuel cells capable of preventing poisoning of catalyst and method of producing the same |
CN202011259996.XA CN113130954B (zh) | 2019-12-31 | 2020-11-12 | 能够防止催化剂中毒的用于燃料电池的电解质膜及其制备方法 |
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JP2025506334A (ja) * | 2022-02-04 | 2025-03-11 | ジョンソン マッセイ ハイドロジェン テクノロジーズ リミテッド | 水電解槽のための触媒被覆膜 |
CN114807958B (zh) * | 2022-06-08 | 2024-05-07 | 中国科学院化学研究所 | 一种高比表面积质子交换膜电极及其制备方法 |
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