KR20220010949A - 산소투과성이 우수한 연료전지용 전극 및 이를 포함하는 막-전극 접합체 - Google Patents
산소투과성이 우수한 연료전지용 전극 및 이를 포함하는 막-전극 접합체 Download PDFInfo
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Abstract
Description
도 2는 본 발명에 따른 연료전지용 전극의 제조방법을 도시한 흐름도이다.
도 3은 본 발명에 따른 막-전극 접합체를 도시한 것이다.
도 4a는 n=7인 내재적 마이크로 기공성 고분자의 3차원 구조를 도시한 측면도이다.
도 4b는 n=7인 내재적 마이크로 기공성 고분자의 3차원 구조를 도시한 평면도이다.
도 5는 본 발명의 실시예3 및 비교예3에 따른 막을 광학현미경으로 관찰한 결과이다.
도 6은 본 발명의 실시예1 내지 실시예4 및 비교예1에 따른 막을 XRD (X-ray diffraction)를 통해 분석한 결과이다.
구분 | 바인더 조성 | 산소 투과도 [barrer]1) |
비교예1 | Nafion w/o PIM | 0.4 |
비교예2 | Nafion w. 1wt% PIM (Mw. 100,000 g/mol) |
상분리로 인해 필름 형성 불가 |
실시예1 | Nafion w. 1wt% PIM (Mw. 3,000 g/mol) |
0.6 |
실시예2 | Nafion w. 3wt% PIM (Mw. 3,000 g/mol) |
1.2 |
실시예3 | Nafion w. 5wt% PIM (Mw. 3,000 g/mol) |
3.8 |
실시예4 | Nafion w. 10wt% PIM (Mw. 3,000 g/mol) |
36 |
실시예5 | Nafion w. 20wt% PIM (Mw. 3,000 g/mol) |
17 |
150: 애노드
10: 촉매 입자 11: 지지체 13: 촉매 금속
20: 바인더 21: 이오노머 23: 내재적 마이크로 기공성 고분자
Claims (17)
- 촉매 입자; 및 상기 촉매 입자가 분산되어 있는 바인더;를 포함하고,
상기 바인더는 수소이온 전도성을 갖는 이오노머; 및 내재적 마이크로 기공성 고분자(Polymers of Intrinsic Microporosity; PIM)를 포함하는 연료전지용 전극. - 제1항에 있어서,
상기 촉매 입자는 지지체 상에 촉매 금속이 담지된 것을 포함하는 연료전지용 전극. - 제1항에 있어서,
상기 이오노머는 과불소 술폰산계 고분자를 포함하는 연료전지용 전극. - 제1항에 있어서,
상기 내재적 마이크로 기공성 고분자는 나선 구조의 형상을 갖는 것인 연료전지용 전극. - 제1항에 있어서,
상기 내재적 마이크로 기공성 고분자는 중량평균분자량이 5,000 g/mol 이하인 것인 연료전지용 전극. - 제1항에 있어서,
상기 바인더는 1중량% 내지 20중량%의 내재적 마이크로 기공성 고분자를 포함하는 연료전지용 전극. - 제1항에 있어서,
산소 투과도가 0.6 barrer 내지 36 barrer인 연료전지용 전극. - 내재적 마이크로 기공성 고분자를 제조하는 단계;
상기 내재적 마이크로 기공성 고분자를 유기용매에 용해시켜 용액을 제조하는 단계;
상기 용액을 이오노머와 혼합하여 바인더를 제조하는 단계;
상기 바인더에 촉매 입자를 첨가하여 슬러리를 제조하는 단계; 및
상기 슬러리를 기재상에 도포하여 전극을 형성하는 단계;를 포함하는 연료전지용 전극의 제조방법. - 제9항에 있어서,
상기 내재적 마이크로 기공성 고분자는;
디메틸포름아마이드(Dimethylformamide, DMF)에 5,5',6,6'-tetrahydroxy-3,3,3',3'-tetramethylspirobisindane(SBI), 2,3,5,6 -tetrafluoroterephthalonitrile(TFTPN) 및 탄산 칼륨(Potassium carbonate, K2CO3)을 투입 및 교반하여 제조하는 것인 연료전지용 전극의 제조방법. - 제9항에 있어서,
상기 유기용매는 테트라하이드로퓨란(Tetrahydrofuran), 이소프로필알콜(Isopropyl alcohol), N-프로필 알코올(N-propyl alcohol) 및 이들의 조합으로 이루어진 군으로부터 선택된 적어도 어느 하나를 포함하는 연료전지용 전극의 제조방법. - 제9항에 있어서,
상기 촉매 입자는 지지체 상에 촉매 금속이 담지된 것을 포함하고,
상기 이오노머는 과불소 술폰산계 고분자를 포함하는 연료전지용 전극의 제조방법. - 제9항에 있어서,
상기 내재적 마이크로 기공성 고분자는 중량평균분자량이 5,000 g/mol 이하인 것인 연료전지용 전극의 제조방법. - 제9항에 있어서,
상기 바인더는 1중량% 내지 20중량%의 내재적 마이크로 기공성 고분자를 포함하는 연료전지용 전극의 제조방법. - 전해질막; 상기 전해질막의 일면에 형성된 캐소드; 및 상기 전해질막의 타면에 형성된 애노드;를 포함하고,
상기 캐소드 및 애노드 중 적어도 어느 하나가 제1항 내지 제8항 중 어느 한 항에 따른 전극을 포함하는 것인 막-전극 접합체.
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US17/121,159 US20220021006A1 (en) | 2020-07-20 | 2020-12-14 | Electrode having high oxygen permeability for fuel cell and membrane-electrode assembly comprising same |
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US8227135B2 (en) | 2005-03-29 | 2012-07-24 | Toyota Motor Corporation | Electrolytes to enhance oxygen reduction reaction (ORR) in the cathode layer of PEM fuel cell |
JP2013216811A (ja) | 2012-04-10 | 2013-10-24 | Toyota Central R&D Labs Inc | 高分子電解質及びその製造方法、並びに、燃料電池 |
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US8227135B2 (en) | 2005-03-29 | 2012-07-24 | Toyota Motor Corporation | Electrolytes to enhance oxygen reduction reaction (ORR) in the cathode layer of PEM fuel cell |
JP2013216811A (ja) | 2012-04-10 | 2013-10-24 | Toyota Central R&D Labs Inc | 高分子電解質及びその製造方法、並びに、燃料電池 |
Non-Patent Citations (4)
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A. Kongkanand et al., J. Phys. Chem. Lett. 2016, 7, 7, 1127-1137 |
A. Rolfi et al., J. Power Sources, 2018, 396, 95-101 |
B. G. Kim et al., Macromol. Res. 2014, 22, 1, 92-98 |
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