DICP OpenIR
Subject Area电化学工程
Proton Exchange Membrane Fuel Cell degradation at Subzero Temperature
Yu HM(俞红梅); Shao ZG(邵志刚); Yi BL(衣宝廉)
Source PublicationBook of Abstracts and Posters
Conference Name2nd International Workshop on Degradation Issues of Fuel Cells
Conference Date2011-9-21
2011
Conference Place塞萨洛尼基
Pages113-0
Publisher待补充
Publication Place待补充
Cooperation Status分会口头报告
Department301
Funding OrganizationEuropean Commission, DG JRC-IE; DLR, Germany; Forschungszentrum Jülich, Germany; DOE, USA; ENEA, Italy; ZSW, Germany; CEA, France
AbstractWith 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.; 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.
Document Type会议论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/116099
Collection中国科学院大连化学物理研究所
Corresponding AuthorYu HM(俞红梅)
Recommended Citation
GB/T 7714
Yu HM,Shao ZG,Yi BL. Proton Exchange Membrane Fuel Cell degradation at Subzero Temperature[C]. 待补充:待补充,2011:113-0.
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