Electrochemical impedance investigation of proton exchange membrane fuel cells experienced subzero temperature
文献类型：期刊论文
| 作者 | Hou, Junbo; Song, Wei; Yu, Hongmei; Fu, Yu; Shao, Zhigang; Yi, Baolian |
| 刊名 | journal of power sources
 |
| 出版日期 | 2007-09-27 |
| 卷号 | 171期号:2页码:610-616 |
| 关键词 | proton exchange membrane (PEM) fuel cell subzero electrochemical impedance spectroscopy mass transport oxygen reduction reaction agglomerate |
| 产权排序 | 1;1 |
| 通讯作者 | 俞红梅 |
| 英文摘要 | polarization losses of the fuel cells with different residual water amount frozen at subzero temperature were investigated by electrochemical impedance spectroscopy (eis) taking into account the ohmic resistance, charge transfer process, and oxygen mass transport. the potential-dependent impedance before and after eight freeze/thaw cycles suggested that the ohmic resistance did not change, while the change of the charge transfer resistance greatly depended on the residual water amount. among the four cells, the mass transport resistance of the cell with the largest water amount increased significantly even at the small current density region. according to the thin film-flooded agglomerate model, the interfacial charge transfer process and oxygen mass transport within the agglomerate and through the ionomer thin film in the catalyst layer both contributed to the high frequency impedance arc. from the analysis of the tafel slopes, the mechanism of the oxygen reduction reaction (orr) was the same after the cells experienced subzero temperature. the agglomerate diffusion changed a little in all cells and the thin film diffusion effect was obvious for the cell with the largest residual water amount. these results indicated that the slower oxygen diffusion within the catalyst layer (cl) was the main contributor for the evident performance loss after eight freeze/thaw cycles. (c) 2007 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] | gas-diffusion electrodes ; cold start ; behavior |
| 收录类别 | SCI |
| 原文出处 | true |
| 语种 | 英语 |
| WOS记录号 | WOS:000250066900047 |
| 公开日期 | 2010-11-30 |
| 源URL | [http://159.226.238.44/handle/321008/98869]  |
| 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 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, Fuel Cell Syst & Engn Lab, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hou, Junbo,Song, Wei,Yu, Hongmei,et al. Electrochemical impedance investigation of proton exchange membrane fuel cells experienced subzero temperature[J]. journal of power sources,2007,171(2):610-616. |
| APA | Hou, Junbo,Song, Wei,Yu, Hongmei,Fu, Yu,Shao, Zhigang,&Yi, Baolian.(2007).Electrochemical impedance investigation of proton exchange membrane fuel cells experienced subzero temperature.journal of power sources,171(2),610-616. |
| MLA | Hou, Junbo,et al."Electrochemical impedance investigation of proton exchange membrane fuel cells experienced subzero temperature".journal of power sources 171.2(2007):610-616. |
入库方式： OAI收割
来源：大连化学物理研究所
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