Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Brennstoffzellentechnologie"'
Autor:
Porstmann, Sebastian, Biák, Martin
Die Brennstoffzellentechnologie bietet eine immense Chance für eine zukünftige emissionsfreie Mobilität. Eine der größten Herausforderungen für deren Durchbruch sind allerdings die aktuell noch hohen Kosten im Vergleich zu den marktetablierten
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od_______610::9b0e4702c2a5072d175d4b2229b14dcd
https://publica.fraunhofer.de/handle/publica/259794
https://publica.fraunhofer.de/handle/publica/259794
Publikováno v:
International Journal of Hydrogen Energy. 38:15318-15327
In this study, we experimentally investigate the appearance of a local negative differential resistance (N-NOR) branch in polarization curves of a segmented 7 by 7 cell measured under the steady and highly-dynamic conditions. Under both conditions, a
Autor:
Dietmar Gerteisen, Robert Alink
Publikováno v:
Energies, Vol 6, Iss 9, Pp 4508-4530 (2013)
Energies; Volume 6; Issue 9; Pages: 4508-4530
Energies; Volume 6; Issue 9; Pages: 4508-4530
In order to model the liquid water transport in the porous materials used in polymer electrolyte membrane (PEM) fuel cells, the pore network models are often applied. The presented model is a novel approach to further develop these models towards a p
Publikováno v:
Energy. 59:402-412
Efficient and clean vehicles are highly demanded in China due to the increasing severe energy and environmental issues. In this study, based on the current (2009) and predicted (2020) situations of China, ICEVs (internal combustion engine vehicles),
Autor:
Dietmar Gerteisen
Publikováno v:
Journal of Power Sources. 195:6719-6731
The present dynamic model is developed to investigate the coupled reaction mechanisms in a DMFC and therein associated voltage losses in the catalyst layers. The model describes a complete five-layer membrane electrode assembly (MEA), with gas diffus
Autor:
Matthias Soehn, Christina Roth, Virginie Croze, Dominic Stuermer, Frank Ettingshausen, Julia Melke
Publikováno v:
Journal of Applied Electrochemistry. 40:877-883
For a detailed understanding and systematic optimization of fuel cell systems, in situ studies are an indispensable tool, as they provide information on the catalyst structure in different operation conditions. X-ray absorption spectroscopy (XAS) is
Autor:
Dietmar Gerteisen
A physically-based 1D impedance model of the cathode catalyst layer that accounts for inhomogeneous catalyst layer (CL) properties is developed. The impact of locally changing proton conductivity, volumetric double-layer capacity, ORR rate and effect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::802d562c0f36b550c77d3d3780585f85
https://publica.fraunhofer.de/handle/publica/241506
https://publica.fraunhofer.de/handle/publica/241506
Autor:
Henning Markötter, Ingo Manke, Robert Alink, Joachim Scholta, Jan Haußmann, K. Dittmann, Heinrich Riesemeier, John Banhart, Dietmar Gerteisen
Publikováno v:
Electrochemistry Communications, Vol 51, Iss, Pp 133-136 (2015)
We used synchrotron X-ray imaging to investigate the influence of local fibre structures of gas diffusion layers (GDLs) in polymer electrolyte membrane fuel cells on the transport of water. Two different measurement techniques, namely in-situ radiogr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7386a5b9214f7e1a1b2e6f97b8ddd83a
https://publica.fraunhofer.de/handle/publica/239415
https://publica.fraunhofer.de/handle/publica/239415
FIB-SEM tomography is used to reconstruct the carbon-binder domain (CBD) of a LiCoO2 battery cathode (3.9 × 5 × 2.3 mm3) with contrast enhancement by ZnO infiltration via atomic layer deposition. We calculate the porosity inside the CBD (57.6%), th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od_______610::c17dcf9f86ed9d0899051c58f0318ce5
https://publica.fraunhofer.de/handle/publica/242655
https://publica.fraunhofer.de/handle/publica/242655
In this work, an overview of three different through-plane resistivity measurement methods accompanied with the in-plane resistivity measurement method is given and the methods thoroughly evaluated. It is found that the accuracy of the results is hig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e018070e4929554a4fe1594fd1b90c4
https://publica.fraunhofer.de/handle/publica/240384
https://publica.fraunhofer.de/handle/publica/240384