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题名: In situ analysis on water transport in a direct methanol fuel cell durability test
作者: Tian, Yang1, 2;  Sun, Gongquan1;  Mao, Qing1, 2;  Wang, Suli1;  Liu, He1, 2;  Xin, Qin1, 3
通讯作者: 孙公权
关键词: Direct methanol fuel cell ;  Durability ;  Performance recovery ;  Water analysis ;  Cathode gas diffusion layer
刊名: JOURNAL OF POWER SOURCES
发表日期: 2008-12-01
DOI: 10.1016/j.jpowsour.2008.08.095
卷: 185, 期:2, 页:1015-1021
收录类别: SCI
文章类型: Article
部门归属: 3
项目归属: 305
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Electrochemistry ;  Energy & Fuels
研究领域[WOS]: Electrochemistry ;  Energy & Fuels
英文摘要: In present work, a 600 h durability test and in situ measurements of water transport were carried out on a single direct methanol fuel cell (DMFC) at atmospheric pressure and 80 degrees C. Effect of water transport on the single cell performance was investigated in detail, which indicated that the accumulated water in the hydrophobic micropores of the cathode gas diffusion layer (GDL) aggravated the cathode flooding, and consequently led to a temporary and reversible degradation of the cell performance. Further investigation revealed that cathode flooding could be alleviated by blowing the cathode with dry air for 150 h at open circuit condition and the partially recovered cell performance within the durability could be obtained in consequence. Water analysis combined with the scanning electron microscopy (SEM), contact angle measurement and energy dispersive X-ray (EDX) was used to explore the characteristics of cathode GDL before and after the durability test. Results showed that the variation of the microstructure and hydrophobic properties for both sides of the cathode GDL is probably one of the inherent reasons for the irreversible degradation of the cell performance besides the electro-catalysts deterioration. (c) 2008 Elsevier B.V. All rights reserved.
关键词[WOS]: GAS-DIFFUSION LAYER ;  PERFORMANCE DEGRADATION ;  ELECTROOSMOTIC DRAG ;  DMFC ;  MEMBRANES ;  CROSSOVER
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000261748900065
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/101401
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.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Tian, Yang,Sun, Gongquan,Mao, Qing,et al. In situ analysis on water transport in a direct methanol fuel cell durability test[J]. JOURNAL OF POWER SOURCES,2008,185(2):1015-1021.
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