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논문 기본 정보
- 자료유형
- 학위논문
- 저자정보
- 지도교수
- 정남기, 임성대
- 발행연도
- 2021
- 저작권
- 충남대학교 논문은 저작권에 의해 보호받습니다.
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초록· 키워드
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When the membrane electrode assembly (MEA) for a polymer electrolyte membrane fuel cell (PEMFC) is evaluated in a large-area bipolar plate,the non-uniformity of the operating environment (oxygen concentration, relative humidity, etc.) formed inside the bipolar plate leads to distorted results, which lowers the efficiency of the R&D process for MEA development.
To overcome this problem, we proposed an MEA development methodology that accurately measures intrinsic MEA performance while considering the uneven reaction environments formed inside a large-area BP. To facilitate measurement of the inherent MEA performance, we miniaturized the active area of the MEA to 3 cm2, and prepared two MEAs with different ionomer contents of 0.65 and 0.80 (I/C). By simulating the operating conditions of a 100 cm2 BP at the inlet (I), center (C), and outlet (O), the oxygen concentration and relative humidity were determined to be 20.7, 13.8, 11.7%, and 50, 66.1, and 70.1% respectively. We measured the performance and electrochemical analysis of the prepared MEAs under the three simulated conditions. Based on the results of statistical analysis of the evaluated MEA performance data, I/C 0.65 MEA had a higher average performance and lower performance deviation than I/C 0.80 MEA. Hence, it can be concluded that an I/C 0.65 MEA is a more effective MEA for large-area BP. Based on the above research process, we confirmed the effectiveness of the proposed MEA development methodology.
To overcome this problem, we proposed an MEA development methodology that accurately measures intrinsic MEA performance while considering the uneven reaction environments formed inside a large-area BP. To facilitate measurement of the inherent MEA performance, we miniaturized the active area of the MEA to 3 cm2, and prepared two MEAs with different ionomer contents of 0.65 and 0.80 (I/C). By simulating the operating conditions of a 100 cm2 BP at the inlet (I), center (C), and outlet (O), the oxygen concentration and relative humidity were determined to be 20.7, 13.8, 11.7%, and 50, 66.1, and 70.1% respectively. We measured the performance and electrochemical analysis of the prepared MEAs under the three simulated conditions. Based on the results of statistical analysis of the evaluated MEA performance data, I/C 0.65 MEA had a higher average performance and lower performance deviation than I/C 0.80 MEA. Hence, it can be concluded that an I/C 0.65 MEA is a more effective MEA for large-area BP. Based on the above research process, we confirmed the effectiveness of the proposed MEA development methodology.
목차
1. 서론 11.1. 연료전지의 종류 및 특성 41.2. 고분자 전해질 막 연료전지의 구조 및 작동원리 81.3. 막전극접합체 (MEA)의 연구 동향 141.4. 분리판에서의 불균일성 161.5. 연구 목적 및 필요성 182. 실험 방법 202.1. 촉매슬러리 제조 202.2. 막전극접합체 (MEA) 제조 212.3. MEA의 전기화학 특성 평가 232.4. 분리판 위치별 운전 환경 모사 252.5. 소형 단위전지 273. 결과 및 고찰 283.1. 이오노머 함량이 다른 두 MEA의 전기화학 특성 283.2. 분리판 위치별로 모사된 상이한 반응 환경에서 MEA의 전기화 학 특성 353.3. MEA의 이오노머 함량 차이에 따른 모사반응조건에서의 성능 민감도 분석 474. 결론 51참고문헌 52Abstract 58
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