Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.
2018Characteristic time constants derived from the low-frequency arc of impedance spectra of fuel cell stacks
Keller, S.; Özel, T.; Scherzer, A.-C.; Gerteisen, D.; Groos, U.; Hebling, C.; Manoli, Y.
Journal Article
2018Influence of surface properties on the dip coating behavior of hollow fiber membranes
Jesswein, Isabel; Übele, Sarah; Dieterich, Alina; Keller, Silke; Hirth, Thomas; Schiestel, Thomas
Journal Article
2018A Modular Fuel Cell Battery Hybrid Propulsion System for Powering Small Utility Vehicles
Keller, S.; Christmann, K.; Gonzalez, M.S.-A.; Heuer, A.
Conference Paper
2018Windenergie Report Deutschland 2017
Behem, Guillaume; Berkhout, Volker; Buchmann, Elisabeth; Callies, Doron; Cernusko, Robert; Dobschinski, Jan; Durstewitz, Michael; Faulstich, Stefan; Grashof, Katherina; Hahn, Berthold; Jäger, Florian; Keller, Sarina; Lutz, Marc-Alexander; Meyer, Julian; Ortega, Andres; Pfaffel, Sebastian; Pfennig, Maximilian; Puchta, Matthias; Rehwald, Florian; Rettenmeier, Andreas; Dalla Riva, Alberto; Röpnack, Andreas
: Rohrig, Kurt (Hrsg.)
Report
2017Characterization of PEM fuel cells by electrochemical impedance spectroscopy
Gerteisen, D.; Scherzer, A.-C.; Keller, S.
Presentation
2017clickECM: Development of a cell-derived extracellular matrix with azide functionalities
Ruff, S.M.; Keller, S.; Wieland, D.E.; Wittmann, V.; Tovar, G.E.M.; Bach, M.; Kluger, P.J.
Journal Article
2017Elektrischer Antriebsstrang für Arbeits- und Nutzfahrzeuge (ELAAN)
Keller, S.
Conference Paper
2017A modular fuel cell battery hybrid propulsion system for powering small utility vehicles
Keller, S.; Christmann, K.; Sanchez-Arjona Gonzalez, M.; Heuer, A.
Presentation
2017Windenergie - wo stehen wir?
Hahn, B.; Becker, R.; Keller, S.; Rettenmeier, A.; Teßmer, J.
Presentation
2016Characteristic low frequency time constants derived from impedance spectra of fuel cell stacks
Keller, S.; Özel, T.; Scherzer, A.-C.; Gerteisen, D.; Groos, U.
Presentation
2016clickECM - a new approach to covalently immobilize human ECM on artificial surfaces
Keller, Silke; Ruff, Sybil Mara; Bach, Monika; Kluger, Petra
Abstract
2016High density perforation of thin Al-foils with ultra short pulse lasers in dependence on the repetition rate
Hambach, N.; Hartmann, C.; Keller, S.; Gillner, A.
Journal Article
2016Hybride Montagesysteme in der Fahrzeugmontage. Wirtschaftlich partizipative Gestaltung der Mensch-Roboter-Kooperation
Häberer, Sebastian; König, Alexander; Keller, Sebastian
Journal Article
2016Impedance spectroscopy of PEM fuel cells with large geometric area - challenges and opportunities
Gerteisen, D.; Scherzer, A.-C.; Keller, S.; Zamel, N.; Groos, U.
Presentation
2016Investigation of inhomogenieties in automotive fuel cell stacks
Groos, U.; Keller, S.
Presentation
2015Characterization of a fuel cell stack for use in material handling applications
Keller, S.; Cremers, C.; Niedergesäß, A.; Özel, T.
Conference Paper
2015Efficient electricity supply with a PEM fuel cell system during challenging ambient conditions
Keller, S.; Koch, W.; Ammon, G.
Presentation
2015Die Grenzen des Wachstums sind noch nicht erreicht
Hahn, B.; Berkhout, V.; Ponick, B.; Stübig, C.; Keller, S.; Felder, M.; Jachmann, H.
Report
2014Analysis process for different polymere electrolyte fuel cell stacks to derive a control strategy based on impedance data
Keller, S.; Popenheim, A.; Hempel, M.; Gläsker, K.; Manoli, Y.
Journal Article
2014Effect of oxygen addition on the water–gas shift reaction over Pt/CeO2 catalysts in microchannels
Neuberg, Stefan; Keller, Steffen; O'Connell, Martin; Schürer, Jochen; Thiele, Richard; Zapf, Ralf; Ziogas, Athanassios; Kolb, Gunther
Journal Article
2014Effect of oxygen addition to the feed of a 5 kwel microstructured WATER-GAS shift reactors
Schürer, Jochen; Keller, Steffen; Ziogas, Athanassios; Thiele, Richard; Kolb, Gunther
Conference Paper
2014Sheet bulge testing
Hallfeldt, Torsten; Hotz, Walter; Leppin, Christian; Keller, Stefan; Friebe, Harald; Till, Edwin T.; Müller, Roland; Vucetic, Dragan; Vegter, Henk
Book Article
2013Effect of local perturbation on electrochemical impedance spectroscopy of PEM fuel cells - understanding the characteristics
Kurz, T.; Gerteisen, D.; Keller, S.; Bhattarai, A.; Zamel, N.; Groos, U.; Hebling, C.
Presentation
2013High density perforation of thin Al-foils with ultra short pulse lasers
Hartmann, C.; Hambach, N.; Jüngst, M.; Keller, S.; Holtkamp, J.; Gillner, A.
Journal Article
2013High density perforation of thin Al-foils with ultra short pulse lasers
Hartmann, C.; Hambach, N.; Jüngst, M.; Keller, S.; Holtkamp, J.; Gillner, A.
Conference Paper
2013Local eis studies in PEMFC-distinguishing between through-plane and in-plane oxygen effects
Gerteisen, D.; Keller, S.; Bhattarai, A.; Zamel, N.; Groos, U.; Hebling, C.
Presentation
2013Microchannel fuel processors as a hydrogen source for fuel cells in distributed energy supply systems
Kolb, Gunther; Keller, Steffen; O'Connell, Martin; Pecov, Sascha; Schürer, Jochen; Spasova, Berta; Tiemann, David; Ziogas, Athanassios
Journal Article
2010Origin of damages in OLED from Al top electrode deposition by DC magnetron sputtering
Gil, T.H.; May, C.; Scholz, S.; Franke, S.; Törker, M.; Lakner, H.; Leo, K.; Keller, S.
Journal Article
2009Al Top Cathode Deposition on OLED Using DC Magnetron Sputtering
Gil, T.H.; May, C.; Lakner, H.; Leo, K.; Keller, S.
Journal Article
2009Universelle Elektronikplattform
Keller, S.; Lemes, Z.
Journal Article
2008Al top cathode deposition on OLED using DC magnetron sputtering
Gil, T.H.; May, C.; Lakner, H.; Leo, K.; Keller, S.
Conference Paper
2005Local wing tilt analysis of laterally overgrown GaN by x-ray rocking curve imaging
Lübbert, D.; Baumbach, T.; Mikulik, P.; Pernot, P.; Helfen, L.; Köhler, R.; Katona, T.M.; Keller, S.; DenBaars, S.P.
Journal Article
2000Verfahren zur Zuordnung der einkoppelseitigen Enden der einzelnen Lichtleitfasern eines Lichtleiterbuendels zu den auskoppelseitigen Enden dieser Lichtleitfasern
Eikelmann, E.; Keller, S.; Pfeiffer, T.
Patent