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题名: Effect of fabrication methods of bifunctional catalyst layers on unitized regenerative fuel cell performance
作者: Chen, Guobao1, 2;  Zhang, Huamin1;  Ma, Haipeng1;  Zhong, Hexiang1
通讯作者: 张华民
关键词: Bifunctional catalyst layer ;  Unitized regenerative fuel cell ;  Membrane electrode assembly ;  Electrochemical impedance spectra ;  Spraying technique
刊名: ELECTROCHIMICA ACTA
发表日期: 2009-09-30
DOI: 10.1016/j.electacta.2009.04.043
卷: 54, 期:23, 页:5454-5462
收录类别: SCI
文章类型: Review
部门归属: 3
项目归属: 303
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Electrochemistry
研究领域[WOS]: Electrochemistry
英文摘要: In order to understand the origins of performance variations in unitized regenerative fuel cells (URFCs), bifunctional catalyst layers (BCLs) fabricated with two different methods, i.e., ink deposition on membrane or GDL. were designed in this paper. The performances of the two different methods were evaluated, and their reaction dynamics were measured by electrochemical impedance spectra. The different BCLs, caused by the different preparation processes, were found to influence the fuel cell performance. The cell potentials of the URFCs using platinum sprayed onto the gas diffusion layer (GDL) are above 0.100 V higher than those with platinum sprayed onto the membrane at 800 mA cm(-2) in fuel cell (FC) mode. The mass transport resistances of the URFCs at different operation modes were also compared. It was proved that the platinum layer formed by applying platinum onto the GDL could prevent the cell from water flooding in FC mode. However, it was found that the cell performance changed slightly in water electrolysis mode with different BCLs. The electron conduction path was also found to be hindered by an IrO(2) agglomerate, which led to a decrease in cell performance. The highest and lowest round-trip efficiencies of the URFC with different BCLs were 42.1% and 22.3%, respectively, at 800 mA cm(-2). (C) 2009 Elsevier Ltd. All rights reserved.
关键词[WOS]: ELECTROCHEMICAL IMPEDANCE ;  ELECTROCATALYSTS ;  ELECTRODE ;  REDUCTION
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000268518500021
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/102647
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, Key Mat Lab PEMFCs, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Chen, Guobao,Zhang, Huamin,Ma, Haipeng,et al. Effect of fabrication methods of bifunctional catalyst layers on unitized regenerative fuel cell performance[J]. ELECTROCHIMICA ACTA,2009,54(23):5454-5462.
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