Deterioration of Nafion 115 membrane in direct methanol fuel cells

Cited 19 time in webofscience Cited 0 time in scopus
  • Hit : 277
  • Download : 0
A membrane elect rode assembly (MEA) based on a Nafion 115 membrane shows a 29% loss in power density after continuous testing in a single direct methanol fuel cell for 1000h at 50 degrees C. One of the main reasons for this behaviour is a deterioration of the membrane, namely, its ion-exchange capacity is reduced by 17%. The thermal decomposition behaviour of an untested and degraded membrane is Studied by evolved gas analysis-mass spectrometry, pyrolysis-gas chromatography-mass spectrometry, thermo-gravimetric analysis, differential scanning calorimetry, and in situ FTIR reflectance absorption spectra. The results reveal a decrease in thermal stability of the degraded membrane. The Nafion 115 membrane is suggested to lose ion-exchange capacity after the sulfonic acid group is transformed to a thermally less-stable group, Such as the persulfonic add -SO(2)OOH group during MEA operation. The Structural changes may prevent the formation of ionic clusters. (C) 2009 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2009-06
Language
English
Article Type
Article
Keywords

THERMAL-BEHAVIOR; CROSSOVER; IR

Citation

JOURNAL OF POWER SOURCES, v.191, no.2, pp.312 - 319

ISSN
0378-7753
DOI
10.1016/j.jpowsour.2009.01.101
URI
http://hdl.handle.net/10203/175116
Appears in Collection
CBE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 19 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0