This title appears in the Scientific Report :
2010
Please use the identifier:
http://dx.doi.org/10.1016/j.elecom.2010.07.009 in citations.
The influence of cathode flow field surface properties on the local and time-dependent performance of direct methanol fuel cells
The influence of cathode flow field surface properties on the local and time-dependent performance of direct methanol fuel cells
The influence of cathode flow field wettability on the local and time-dependent performance of DMFCs was investigated by galvanostatic measurements of local current distribution, cell voltage and pressure drop along the cathode channels. The cathode flow fields made of graphite were either untreated...
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Personal Name(s): | Schröder, A. |
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Wippermann, K. / Zehl, G. / Stolten, D. | |
Contributing Institute: |
Technoökonomische Systemanalyse; IEK-3 JARA-ENERGY; JARA-ENERGY |
Published in: | Electrochemistry communications, 12 (2010) S. 1318 - 1321 |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2010
|
Physical Description: |
1318 - 1321 |
DOI: |
10.1016/j.elecom.2010.07.009 |
Document Type: |
Journal Article |
Research Program: |
Rationelle Energieumwandlung |
Series Title: |
Electrochemistry Communications
12 |
Subject (ZB): | |
Publikationsportal JuSER |
The influence of cathode flow field wettability on the local and time-dependent performance of DMFCs was investigated by galvanostatic measurements of local current distribution, cell voltage and pressure drop along the cathode channels. The cathode flow fields made of graphite were either untreated, hydrophobic or hydrophilic. Drop shape analysis yielded contact angles in the descending order hydrophobic (126.8 degrees), untreated (115.9 degrees) and hydrophilic (26.2 degrees). Especially at low air stoichiometry (lambda(air) = 2), hydrophilic cathode flow fields are advantageous with regard to higher power densities, suppression of local current fluctuations and substantial reduction of pressure drop along the cathode channels. (C) 2010 Elsevier B.V. All rights reserved. |