Bohnenberger, T., Matovic, J., & Schmid, U. (2011). Thin Catalyst Layers Based on Carbon Nanotubes for PEM-Fuel Cell Applications. In U. Schmid, J. L. Sánchez-Rojas, & M. Leester-Schaedel (Eds.), Smart Sensors, Actuators, and MEMS V (pp. 1–7). SPIE. https://doi.org/10.1117/12.886868
In this study, two approaches are compared to develop thin, multifunctional films of carbon nanotubes (CNT) which are targeted to serve as a catalyst layer in fuel cells. The first is based on the direct deposition of mixed multi- and single-wall CNTs on metalized silicon wafers, using the metallization as a sacrificial layer to
subsequently detach the CNT film from the substrate. It is a less time consuming and a straight forward method compared to the alternative under investigation, the layer-by-layer technique (LbL). The LbL uses bilayers of charged nanotubes to slowly build up a film with an exactly defined thickness. The process is well controlled,but the time constants for deposition of each bilayer are rather high (i.e. about 1 h). With additional annealing steps implemented during film generation this method, however, is regarded advantageous as membranes results with improved mechanical stability and a good homogeneity.
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Project title:
Innovative Generation von Protonen-Austausch-Membran-Brennstoffzellen (PEMFC) unter Einsatz von Nanomembran-Funktionsgruppen
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Research Areas:
Sustainable Production and Technologies: 10% Sustainable and Low Emission Mobility: 10% Sensor Systems: 35% Structure-Property Relationship: 15% Special and Engineering Materials: 20% Materials Characterization: 10%