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

References

[1]D illon R,Srin ivasan S,AricòA S,et al.Internationalactivities in DMFC R&D:status of technologies and po-tential app lications[J].J.Power Sources,2004,127:112~126.
[2]Haile S M.Fuel cellm aterials and components[J].Ac-ta M aterialia,2003,51:5 981~6 000.
[3]Costam agna P,Srin ivasan S.Quantum jumps in thePEMFC sc ience and technology from the 1960 s to theyear 2000,Part I.Fundam ental sc ientific aspects[J].J.Power Sources,1999,84:167~172.
[4]W ak izoe M,Velev O A,Srin ivasan S.Analysis of pro-ton exchange m embrane fuel cell perform ance w ith alter-nate m embranes[J].E lectroch im ica Acta,2002,40:335~344.
[5]AricòA S,CretìP,Antonucc i P L,et al.Optim ization ofoperating param eters of a d irect m ethanol fuel cell andphysico-chem ical investigation of catalyst-electrolyte in-terface[J].E lectroch im ica Acta,1998,43,3 719~3 729.
[6]Kn ights S D,Colbow K M,St-P ierre J,et al.Agingm echan ism s and lifetim e of PEFC and DMFC[J].J.Power Sources,2004,127:127~134.
[7]Staiti P,AricòA S,Baglio V,et al.Hybrid nafion-sil-ica m embranes doped w ith heteropolyac ids for app lica-tion in d irectm ethanol fuel cells[J].Solid State Ion ics,2001,145:101~107.
[8]L im a A,Coutanceau C,Léger J M,et al.Investigationof ternary catalysts for m ethanol electroxidation[J].J.App l.E lectrochem.,2001,31:379~386.
[9]G tzM,W endtH.B inary and ternary anode catalyst for-mu lations inc lud ing the elem ents W,Sn and Mo forPEMFCs operated on m ethanol or reform ate gas[J].E lectroch im ica Acta,1998,43:3 637~3 644.
[10]Roth C,Goetz M,Fuess H.Synthesis and character-ization of carbon-supported Pt-Ru-WOxcatalystsby spectroscop ic and d iffraction m ethods[J].J.App l.E lectrochem.,2001,31:793~798.
[11]Kad irgan F,Beden B,Léger J M,et al.Synergisticeffect in the electrocatalytic oxidation of m ethanol onp latinum+pallad ium alloy electrodes[J].J.E lectro-anal.Chem.,1981,125:89~103.
[12]Antolin i E.Form ation of carbon-supported PtM alloysfor low temperature fuel cells:a review[J].M ateri.Chem.Phys.,2003,78:563~573.
[13]Cheng X,Chen L,Peng C,et al.Catalystm icrostruc-utre exam ination of PEMFC m embrane electrode assem-b lies vs.tim e[J].J.E lectrochem.Soc.,2004,151:A48~52.
[14]AricòA S,Antonucc i P L,Mod ica E,et al.E ffect ofPt-Ru alloy composition on h igh-temperature m etha-nol electro-oxidation[J].E lectroch im ica Acta,2002,47:3 723~3 732.
[15]G rugerA,AndréRégis,Schm atko T,et al.Nanostruc-ture of nafion m embrane at d ifferent states of hydra-tion:an IR and Ram an study[J].V ibrational Spec-troscopy,2001,26:215~225.