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Proceedings Paper

Thin catalyst layers based on carbon nanotubes for PEM-fuel cell applications
Author(s): T. Bohnenberger; J. Matovic; U. Schmid
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Paper Abstract

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.

Paper Details

Date Published: 5 May 2011
PDF: 7 pages
Proc. SPIE 8066, Smart Sensors, Actuators, and MEMS V, 80660C (5 May 2011); doi: 10.1117/12.886868
Show Author Affiliations
T. Bohnenberger, Vienna Univ. of Technology (Austria)
J. Matovic, Vienna Univ. of Technology (Austria)
U. Schmid, Vienna Univ. of Technology (Austria)

Published in SPIE Proceedings Vol. 8066:
Smart Sensors, Actuators, and MEMS V
Ulrich Schmid; José Luis Sánchez-Rojas; Monika Leester-Schaedel, Editor(s)

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