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题名: Effects of freeze/thaw cycles and gas purging method on polymer electrolyte membrane fuel cells
作者: Zhang Shengsheng;  Yu Hongmei;  Zhu Hong;  Hou Junbo;  Yi Baolian;  Ming Pingwen
关键词: polymer electrolyte membrane fuel cell (PEMFC) ;  freeze/thaw cycle ;  electrode structure ;  performance degradation ;  gas purging
刊名: CHINESE JOURNAL OF CHEMICAL ENGINEERING
发表日期: 2006-12-01
卷: 14, 期:6, 页:802-805
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Engineering, Chemical
研究领域[WOS]: Engineering
英文摘要: At subzero temperature, the startup capability and performance of polymer electrolyte membrane fuel cell (PEMFC) deteriorates markedly. The object of this work is to study the degradation mechanism of key components of PEMFC-membrane-electrode assembly (MEA) and seek feasible measures to avoid degradation. The effect of freeze/thaw cycles on the structure of MEA is investigated based on porosity and SEM measurement. The performance of a single cell was also tested before and after repetitious freeze/thaw cycles. The experimental results indicated that the performance of a PEMFC decreased along with the total operating time as well as the pore size distribution shifting and micro configuration changing. However, when the redundant water had been removed by gas purging, the performance of the PEMFC stack was almost resumed when it experienced again the same subzero temperature test. These results show that it is necessary to remove the water in PEMFCs to maintain stable performance under subzero temperature and gas purging is proved to be the effective operation.
语种: 英语
WOS记录号: WOS:000243266100015
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140174
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Beijing Jiaotong Univ, Sch Sci, Beijing 100044, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Fuel Cell Ctr, Dalian 116023, Peoples R China

Recommended Citation:
Zhang Shengsheng,Yu Hongmei,Zhu Hong,et al. Effects of freeze/thaw cycles and gas purging method on polymer electrolyte membrane fuel cells[J]. CHINESE JOURNAL OF CHEMICAL ENGINEERING,2006,14(6):802-805.
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