This title appears in the Scientific Report :
2009
Please use the identifier:
http://dx.doi.org/10.1016/j.elecom.2009.06.008 in citations.
Combined local current distribution measurements and high resolution neutron radiography of operating Direct Methanol Fuel Cells
Combined local current distribution measurements and high resolution neutron radiography of operating Direct Methanol Fuel Cells
The current and fluid distribution in Direct Methanol Fuel Cells (DMFCs) was investigated in situ by means of combined high resolution neutron radiography and locally resolved current distribution measurements. The used neutron radiography set-up allows high spatial resolutions down to 70 mu m at th...
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Personal Name(s): | Schröder, A. |
---|---|
Wippermann, K. / Mergel, J. / Lehnert, W. / Stolten, D. / Sanders, T. / Baumhöfer, T. / Sauer, D. U. / Manke, I. / Karjilov, N. / Hilger, A. / Schloesser, J. / Banhart, J. / Hartnig, Ch. | |
Contributing Institute: |
Brennstoffzellen; IEF-3 JARA-ENERGY; JARA-ENERGY |
Published in: | Electrochemistry communications, 11 (2009) S. 1606 - 1609 |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2009
|
Physical Description: |
1606 - 1609 |
DOI: |
10.1016/j.elecom.2009.06.008 |
Document Type: |
Journal Article |
Research Program: |
Rationelle Energieumwandlung |
Series Title: |
Electrochemistry Communications
11 |
Subject (ZB): | |
Publikationsportal JuSER |
The current and fluid distribution in Direct Methanol Fuel Cells (DMFCs) was investigated in situ by means of combined high resolution neutron radiography and locally resolved current distribution measurements. The used neutron radiography set-up allows high spatial resolutions down to 70 mu m at the full test cell area. A local formation of water droplets in the cathode flow field channels could be observed. Strongly inhomogeneous current distributions during cathodic flooding processes result in a performance loss of up to 30% of the initial value. Single CO2 bubbles can be observed at low current densities. The water and current distribution during bi-functional operation of a DMFC was measured for the first time. (C) 2009 Elsevier B.V. All rights reserved. |