Surface and Sructure Investigations of Membrane Electrode Assembly in DMFC Lifetime Testing~*

Authors

CHENGXuan CHENGXuan, Department of Chemistry*, Department of Materials Science and Engineering, State Key Laboratory for Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005,China;
Cheng PENG, Department of Chemistry*, Department of Materials Science and Engineering, State Key Laboratory for Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005,China;
Meng-di YOU, Department of Chemistry*, Department of Materials Science and Engineering, State Key Laboratory for Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005,China;
Jing LIU, Department of Chemistry*, Department of Materials Science and Engineering, State Key Laboratory for Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005,China;
Ying ZHANG, Department of Chemistry*, Department of Materials Science and Engineering, State Key Laboratory for Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005,China;

Corresponding Author

CHENGXuan CHENGXuan

Abstract

The lifetime and performance of a direct methanol fuel cell (DMFC) were investigatedto understand the correlation between thestructure of catalysts /membrane and cell performanceversus time.The cell polarization and performance curves were obtained during the DMFC operation with the time.The catalysts and Nafion~ membrane of the membrane electrode assembly (MEA) from the lifetime test were comprehensively examined by XRD, HRTEM, FTIRand Raman spectroscope techniques.The results revealed that there was significant performance degradation during the first 200 hours operation; while the degradation was slowing down between 200 and 704hours operation.The degradation became worse after 1 002 h operation.The increases of the catalyst particle size from both anode and cathode catalysts wereobserved after the DMFC lifetime test.The changes of microstructure, surface composition, the interfacial structure of the MEA, and the aging of Nafion~ under the DMFC lifetime tests were also observed.

Keywords

DMFC, Life time, Aging, Degradalion, Particle agglomeratiom

DOI Link

https://doi.org/10.61558/2993-074X.1650

Publication Date

2005-08-28

Online Available Date

2005-08-28

Revised Date

2005-08-28

Received Date

2005-08-28

Recommended Citation

CHENGXuan CHENGXuan, Cheng PENG, Meng-di YOU, Jing LIU, Ying ZHANG. Surface and Sructure Investigations of Membrane Electrode Assembly in DMFC Lifetime Testing~*[J]. Journal of Electrochemistry, 2005 , 11(3): 254-261.
DOI: 10.61558/2993-074X.1650
Available at: https://jelectrochem.xmu.edu.cn/journal/vol11/iss3/4