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学科主题: 物理化学
题名: Reversible performance loss induced by sequential failed cold start of PEM fuel cells
作者: Hou, Junbo1, 2;  Yu, Hongmei1;  Yang, Min2;  Song, Wei1;  Shao, Zhigang1;  Yi, Baolian1
通讯作者: 侯俊波 ;  俞红梅 ;  邵志刚
关键词: PEM fuel cells ;  Cold start ;  Freeze degradation ;  Catalyst layer ;  Electrochemical impedance
刊名: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
发表日期: 2011-09-01
DOI: 10.1016/j.ijhydene.2011.06.100
卷: 36, 期:19, 页:12444-12451
收录类别: SCI
文章类型: Article
部门归属: 3
项目归属: 301
产权排名: 1,1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Electrochemistry ;  Energy & Fuels
摘要: Reversible performance loss induced by sequential failed cold start of PEM fuel cells
研究领域[WOS]: Chemistry ;  Electrochemistry ;  Energy & Fuels
英文摘要: This study correlates the post start cell performance and impedance with the cold start process in the subzero environment. The sequential failed cold starts are deliberately conducted as well as the start at small current density. Here the failed cold start means the cell voltage drops to or below zero within very short time during the start process. It is found that there are reversible performance losses for the sequential failed cold starts, while not obvious degradation and no recovery happen for the start at small current density. Using the thin film and agglomerate model, it is confirmed that this is due to the water blocking effect. Comparing the results from different start processes, a model with respect to the shifting of reactive region within the catalyst layer is applied to explain that the reversible performance loss is associated with the amount of the generated water or ice and the water location or distribution during cold start. The relationship of the cold start performance at high current density and the pore volume in the catalyst layer is also discussed. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
关键词[WOS]: MEMBRANE-ELECTRODE ASSEMBLIES ;  OXYGEN REDUCTION REACTION ;  CATALYST LAYER ;  ELECTROCHEMICAL IMPEDANCE ;  PHYSICAL DEGRADATION ;  SUBZERO TEMPERATURES ;  FREEZE/THAW CYCLES ;  MODEL ;  PEFC ;  MEDIA
语种: 英语
WOS记录号: WOS:000295657300042
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/115435
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, Fuel Cells Lab, Dalian 116023, Peoples R China
2.Univ Leoben, Dept Phys Chem, A-8700 Leoben, Austria

Recommended Citation:
Hou, Junbo,Yu, Hongmei,Yang, Min,et al. Reversible performance loss induced by sequential failed cold start of PEM fuel cells[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2011,36(19):12444-12451.
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