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题名: Studies on performance degradation of a direct methanol fuel cell (DMFC) in life test
作者: Liu, JG;  Zhou, ZH;  Zhao, XX;  Xin, Q;  Sun, GQ;  Yi, BL
刊名: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
发表日期: 2004
DOI: 10.1039/b313478d
卷: 6, 期:1, 页:134-137
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical ;  Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Chemistry ;  Physics
英文摘要: A 75 h life test of a direct methanol fuel cell (DMFC) at a low current density of 100 mA cm(-2) was carried out. Electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were applied to characterize the membrane electrode assembly (MEA) during the life test. The EIS results showed that the high frequency cell impedance of the MEA increased from 0.26 ohm cm(2) at the beginning of the life test to 0.37 ohm cm(2) at the end. SEM images of the MEA in cross-section apparently demonstrated the delamination of the electrodes from the membrane after the life test. TEM analysis of the electrocatalysts in the pre- and post-test cell revealed that the agglomeration of the metal particles in the anode was more serious than in the cathode. The results indicate that the agglomeration of electrocatalysts together with the delamination of the MEA concurrently contribute to the performance degradation of the DMFC.
关键词[WOS]: IMPEDANCE SPECTROSCOPY ;  SUPPORTED PLATINUM
语种: 英语
WOS记录号: WOS:000187438000021
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139294
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Direct Alcohol Fuel Cell Lab, Dalian 116023, Peoples R China

Recommended Citation:
Liu, JG,Zhou, ZH,Zhao, XX,et al. Studies on performance degradation of a direct methanol fuel cell (DMFC) in life test[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2004,6(1):134-137.
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