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学科主题: 电化学工程
题名: Proton Exchange Membrane Fuel Cell degradation at Subzero Temperature
作者: Yu HM(俞红梅) ;  Shao ZG(邵志刚) ;  Yi BL(衣宝廉)
会议文集: Book of Abstracts and Posters
会议名称: 2nd International Workshop on Degradation Issues of Fuel Cells
会议日期: 2011-9-21
出版日期: 2011
会议地点: 塞萨洛尼基
通讯作者: 俞红梅
出版者: 待补充
出版地: 待补充
合作性质: 分会口头报告
部门归属: 301
主办者: European Commission, DG JRC-IE; DLR, Germany; Forschungszentrum Jülich, Germany; DOE, USA; ENEA, Italy; ZSW, Germany; CEA, France
摘要: With the support from National Natural Science Foundation of China(NSFC) and 863 High-Tech Program, the research of proton exchange membrane (PEM) fuel cell at subzero temperatures was implemented at Dalian Institute of Chemical Physics. The effect of water freezing during the fuel cell storage and cold start at subzero temperature was investigated. Microstructure analysis , cyclic voltammetry (CV) and electrochemical impedance were implemented to investigate the characteristics of the fuel cell endured subzero environment. Based on the analysis of various water retained amounts in the fuel cell, it was found that ice formation caused not only the irreversible loss but also the reversible loss. Water removal methods were applied to improve the fuel cell subzero survivability. By analyzing the EIS results, the ohmic resistance did not change. The change of the charge transfer resistance depended on the residual water amount, while the mass transport resistance of the cell with the largest residual water amount increased significantly even at small current density region. The electrochemical active surface area (ECSA) from the CV measurements indicated that when the amount of water in the catalyst layer of the cell was reduced to an extent that the damage in the freeze/thaw cycles could be avoided. The pore size distribution data from mercury intrusion porosimetry measurements showed that the porosity of the gas diffusion layer changed after the freeze/thaw cycles.
英文摘要: With the support from National Natural Science Foundation of China(NSFC) and 863 High-Tech Program, the research of proton exchange membrane (PEM) fuel cell at subzero temperatures was implemented at Dalian Institute of Chemical Physics. The effect of water freezing during the fuel cell storage and cold start at subzero temperature was investigated. Microstructure analysis , cyclic voltammetry (CV) and electrochemical impedance were implemented to investigate the characteristics of the fuel cell endured subzero environment. Based on the analysis of various water retained amounts in the fuel cell, it was found that ice formation caused not only the irreversible loss but also the reversible loss. Water removal methods were applied to improve the fuel cell subzero survivability. By analyzing the EIS results, the ohmic resistance did not change. The change of the charge transfer resistance depended on the residual water amount, while the mass transport resistance of the cell with the largest residual water amount increased significantly even at small current density region. The electrochemical active surface area (ECSA) from the CV measurements indicated that when the amount of water in the catalyst layer of the cell was reduced to an extent that the damage in the freeze/thaw cycles could be avoided. The pore size distribution data from mercury intrusion porosimetry measurements showed that the porosity of the gas diffusion layer changed after the freeze/thaw cycles.
内容类型: 会议论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/116099
Appears in Collections:中国科学院大连化学物理研究所_会议论文

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Recommended Citation:
Yu HM,Shao ZG,Yi BL. Proton Exchange Membrane Fuel Cell degradation at Subzero Temperature[C]. 见:2nd International Workshop on Degradation Issues of Fuel Cells. 塞萨洛尼基. 2011-9-21.
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