Sub-freezing endurance of PEM fuel cells with different catalyst-coated membranes
文献类型：期刊论文
| 作者 | Song, Wei1,2; Hou, Junbo1,2; Yu, Hongmei1; Hao, Lixing1,2; Shao, Zhigang1; Yi, Baolian1 |
| 刊名 | journal of applied electrochemistry
 |
| 出版日期 | 2009-05-01 |
| 卷号 | 39期号:5页码:609-615 |
| 关键词 | Fuel cell Proton exchange membrane (PEM) Sub-freezing Freeze/thaw Catalyst layer Hydrophobicity/hydrophilicity |
| 通讯作者 | 俞红梅 |
| 产权排序 | 1;1 |
| 英文摘要 | the sub-freezing endurance of proton exchange membrane (pem) fuel cells with hydrophobic and hydrophilic catalyst-coated membranes (ccms) was investigated. the polarization curves, electrochemical characteristics and physical structures of the ccms were measured. the cells were frozen at -20 a degrees c with saturated residual water after operating at 60 a degrees c. after eight freeze/thaw cycles, no evident negative effect on the performance of the cell with a hydrophobic ccm was observed, while the cell with a hydrophilic ccm degraded severely. by analyzing the polarization curves, it was concluded that the mass transport limitation was the main reason for the performance loss of the hydrophilic cell. the electrochemical active surface area (eca) results suggest that the hydrophobicity of the catalyst layer (cl) has an apparent impact on the residual water distribution of the membrane electrode assembly (mea). a larger water content in the hydrophilic cl has a negative effect on the subzero endurance. from the polarization resistance obtained from electrochemical impedance spectroscopy (eis) the origin of degradation was further clarified. mercury intrusion porosimetry showed that the pore size of the hydrophilic catalyst layer changed significantly after freezing; the mean pore size increased from 5.68 to 6.71 nm. however, with a water removal method, namely, gas purging, it was possible to prevent degradation effectively. |
| WOS标题词 | science & technology ; physical sciences |
| 类目[WOS] | electrochemistry |
| 研究领域[WOS] | electrochemistry |
| 关键词[WOS] | cold start ; electrochemical impedance ; repetitively brought ; performance ; temperatures ; water ; layer ; electrodes ; behavior ; design |
| 收录类别 | SCI |
| 原文出处 | false |
| 语种 | 英语 |
| WOS记录号 | WOS:000265215000007 |
| 公开日期 | 2010-11-30 |
| 源URL | [http://159.226.238.44/handle/321008/101759]  |
| 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, Lab Fuel Cells, Dalian Inst Chem Phys, 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 | Song, Wei,Hou, Junbo,Yu, Hongmei,et al. Sub-freezing endurance of PEM fuel cells with different catalyst-coated membranes[J]. journal of applied electrochemistry,2009,39(5):609-615. |
| APA | Song, Wei,Hou, Junbo,Yu, Hongmei,Hao, Lixing,Shao, Zhigang,&Yi, Baolian.(2009).Sub-freezing endurance of PEM fuel cells with different catalyst-coated membranes.journal of applied electrochemistry,39(5),609-615. |
| MLA | Song, Wei,et al."Sub-freezing endurance of PEM fuel cells with different catalyst-coated membranes".journal of applied electrochemistry 39.5(2009):609-615. |
入库方式： OAI收割
来源：大连化学物理研究所
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