Effect of relative humidity cycles accompanied by intermittent start/stop switches on performance degradation of membrane electrode assembly components in proton exchange membrane fuel cells
文献类型：期刊论文
| 作者 | Qiu, Yanling; Zhong, Hexiang; Wang, Meiri; Zhang, Huamin |
| 刊名 | journal of power sources
 |
| 出版日期 | 2015-06-01 |
| 卷号 | 283页码:171-180 |
| 关键词 | Relative humidity cycles Membrane electrode assembly components Proton exchange membrane fuel cell Intermittent start/stop switches H-2 permeability Catalyst agglomeration |
| 英文摘要 | the performance degradation of membrane electrode assembly (mea) components in proton exchange membrane fuel cell (pemfc) is studied by designing relative humidity (rh) cycles accompanied by intermittent start/stop switches. cathode catalyst activity, permeability and resistance of proton exchange membrane (pem) as well as cell performance are monitored during the test procedure. the interfaces of mea, the catalyst particle distribution near the cathode inlet are characterized by sem and tem, respectively. the results demonstrate both the overall h-2 permeability and crossover current of pem are doubled compared with its initial properties. signs of pem degradation, including periodical thinning, cracks and pinholes formation, are observed after 300 rh cycles and 40 times of start/stop switches. the average pt particle size increases by more than 75%, and the cathode electrochemical surface area decreases by 48% after the test procedure. meanwhile, the cathode catalyst layer becomes looser due to the dissolution of some smaller pt particles and catalyst agglomeration in the rh cycles and the high potential during the intermittent start/stop switches. the membrane resistance demonstrates downshift variation during the rh cycles. pemfc performance, however, decays due to the chemical and electrochemical attack as well as the mechanical stresses. (c) 2015 elsevier b.v. all rights reserved. |
| WOS标题词 | science & technology ; physical sciences ; technology |
| 类目[WOS] | electrochemistry ; energy & fuels |
| 研究领域[WOS] | electrochemistry ; energy & fuels |
| 关键词[WOS] | electrochemical degradation ; microstructural changes ; operating-conditions ; carbon corrosion ; catalyst layers ; durability ; temperature ; cathode ; pemfc ; pefc |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000353731700018 |
| 公开日期 | 2016-05-09 |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/146199]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | Chinese Acad Sci, Dalian Inst Chem Phys, Div Energy Storage, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qiu, Yanling,Zhong, Hexiang,Wang, Meiri,et al. Effect of relative humidity cycles accompanied by intermittent start/stop switches on performance degradation of membrane electrode assembly components in proton exchange membrane fuel cells[J]. journal of power sources,2015,283:171-180. |
| APA | Qiu, Yanling,Zhong, Hexiang,Wang, Meiri,&Zhang, Huamin.(2015).Effect of relative humidity cycles accompanied by intermittent start/stop switches on performance degradation of membrane electrode assembly components in proton exchange membrane fuel cells.journal of power sources,283,171-180. |
| MLA | Qiu, Yanling,et al."Effect of relative humidity cycles accompanied by intermittent start/stop switches on performance degradation of membrane electrode assembly components in proton exchange membrane fuel cells".journal of power sources 283(2015):171-180. |
入库方式： OAI收割
来源：大连化学物理研究所
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