This title appears in the Scientific Report :
2010
Please use the identifier:
http://dx.doi.org/10.1007/s10800-009-9960-9 in citations.
Pseudo-half-cell measurements on symmetrical catalyst-coated membranes and their relevance for optimizing DMFC anodes
Pseudo-half-cell measurements on symmetrical catalyst-coated membranes and their relevance for optimizing DMFC anodes
The preparation of catalyst-coated membranes (CCMs) with two anodic catalyst layers (60% PtRu/C as catalyst) using a decal technique and their characterization by pseudo-half-cell measurements using both sides of the CCMs by simply turning the test cell around, allows the characterization of quasi-i...
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Personal Name(s): | Wannek, C. |
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Nehr, S. / Vahlenkamp, M. / Mergel, J. / Stolten, D. | |
Contributing Institute: |
Brennstoffzellen; IEF-3 JARA-ENERGY; JARA-ENERGY |
Published in: | Journal of applied electrochemistry, 40 (2010) S. 29 - 38 |
Imprint: |
Dordrecht [u.a.]
Springer Science + Business Media B.V
2010
|
Physical Description: |
29 - 38 |
DOI: |
10.1007/s10800-009-9960-9 |
Document Type: |
Journal Article |
Research Program: |
Rationelle Energieumwandlung |
Series Title: |
Journal of Applied Electrochemistry
40 |
Subject (ZB): | |
Publikationsportal JuSER |
The preparation of catalyst-coated membranes (CCMs) with two anodic catalyst layers (60% PtRu/C as catalyst) using a decal technique and their characterization by pseudo-half-cell measurements using both sides of the CCMs by simply turning the test cell around, allows the characterization of quasi-identical CCMs with a much smaller experimental uncertainty than observed for the classical direct methanol fuel cell (DMFC) testing of membrane electrode assemblies under similar working conditions (5 mV vs. 12 mV at a current density of 140 mA cm(-2)). With this new sensitive tool, we study the influence of the dispersing technology and the Nafion content on the performance of DMFC anodes. While the ionomer content shows a broad optimum between 20 and 40%, the dispersing technology does not have a strong impact on the fuel cell performance under the experimental conditions of this study, but influences strongly the stability of the catalyst slurries and the homogeneity of the electrode coatings. |