| 학회 | 한국화학공학회 |
| 학술대회 | 2010년 가을 (10/21 ~ 10/22, 대전컨벤션센터) |
| 권호 | 16권 2호, p.1727 |
| 발표분야 | 에너지 |
| 제목 | Development of MEA for PEM Fuel Cell Stacksunder Dead-End Mode |
| 초록 | In dead-end mode, PEMFC can achieve not only high fuel efficiency through minimizing fuel consumption, but the system also can be simplified because gas supply system is not required. Because dead-end stack is the closed system that outlet of anode and cathode side are blocked, the dead-end stack requires periodic venting operation at both sides to prevent decreasing performance from water accumulation. This periodic venting operation causes high pressure drop during vent valve on/off, which is followed by periodical pressure spike on MEA. In additions, because pressurized pure hydrogen and oxygen are used in dead-end mode stack, there exist potential fire hazards caused by H2/O2 gas mixture. In this study, a 2kW-class PEMFC stack was fabricated and evaluated under dead-end mode. Experimental results indicated that several cells in stack showed low open circuit voltage after 1500hrs dead-ended operation. We drew the conclusion that this was due to the internal crossover leakage by detecting pin-holes from MEA post-mortem test. To prevent MEA failure, sub-gasket areas were extended to vulnerable areas, and its durability over 5000hrs was verified through simulated pressure shock test. |
| 저자 | 김민성1, 정지훈1, 서하규1, 한인수1, 신현길1, 허태욱2, 조성백2 |
| 소속 | 1GS칼텍스, 2국방과학(연) |
| 키워드 | 연료전지; 막전극접합체 |
| 원문파일 | 초록 보기 |
