Hostname: page-component-78c5997874-j824f Total loading time: 0 Render date: 2024-11-19T10:54:52.508Z Has data issue: false hasContentIssue false
  • English
  • Français

Corrosion-Resistant Tantalum Coatings for PEM Fuel Cell Bipolar Plates

Published online by Cambridge University Press:  11 February 2011

Leszek Gladczuk ,
Chirag Joshi ,
Anamika Patel ,
Jim Guiheen ,
Zafar Iqbal  and
Marek Sosnowski
Leszek Gladczuk
Affiliation:
Department of Electrical Engineering and, New Jersey Institute of Technology, Newark, New Jersey 07102, USA
Chirag Joshi
Affiliation:
Department of Electrical Engineering and, New Jersey Institute of Technology, Newark, New Jersey 07102, USA
Anamika Patel
Affiliation:
Department of Electrical Engineering and, New Jersey Institute of Technology, Newark, New Jersey 07102, USA
Jim Guiheen
Affiliation:
Honeywell International Inc, Morristown, New Jersey 07960, USA
Zafar Iqbal
Affiliation:
Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, New Jersey 07102, USA
Marek Sosnowski
Affiliation:
Department of Electrical Engineering and, New Jersey Institute of Technology, Newark, New Jersey 07102, USA
Get access

Abstract

Tantalum is a tough, corrosion resistant metal, which would be suitable for use as bipolar plates for proton exchange membrane (PEM) fuel cells, if it was not for its high weight and price. Relatively thin tantalum coatings, however, can be deposited on other inexpensive and lighter weight metals, such as aluminum and steel, providing a passive protection layer on these easily formed substrates. We have successfully deposited, high quality α (body-centered-cubic, bcc) and β (tetragonal) phase tantalum coatings that were a few micrometers thick by dc magnetron sputtering on steel and aluminum. The growth of the thermodynamically preferred body-centered-cubic (bcc) tantalum phase was induced by a choice of deposition conditions and substrate surface treatment. The microstructure and corrosion resistance of the α-phase in an environment approximately simulating the electrochemical conditions used in a PEM fuel cell were investigated under potentiodynamic conditions. Preliminary potentiostatic measurements of a β-phase sample are also presented.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 756: Symposia EE/FF – Solid-State Ionics – Materials for Fuel Cells and Fuel Processors , 2002 , FF7.2
Copyright
Copyright © Materials Research Society 2003

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1] Dai, H., Guiheen, J., Iqbal, Z. and Rehg, T., Extended Abstracts of the 3rd International Symposium on New Materials for Electrochemical Systems, Montreal, Canada (1999), p. 289.Google Scholar
[2] Westwood, W.D., Waterhouse, N. and Wilcox, P.S., “Tantalum Thin Films”(Academic, London, 1975).Google Scholar
[3] Holloway, K and Fryer, P.M., Appl. Phys. Lett. 57, 1736, (1990).Google Scholar
[4] Hieber, K. and Mayer, N.M., Thin Solid Films, 90, 43 (1982).Google Scholar
[5] Jiang, S.S., Hu, A., Peng, R.W., and Feng, D., J. Magn. Magn. Mater. 82, 126 Google Scholar
[6] Patel, A., Gladczuk, L., Paur, C. and Sosnowski, M., Mat. Res. Soc. Symp. Proc. Vol. 697, pp. 5.6.1–5.6.6, 2002.Google Scholar
[7] Patel, A., Gladczuk, L., Paur, C. and Sosnowski, M., Mat. Res. Soc. Symp. Proc. (submitted). Google Scholar