Ferritic Stainless Steels as Bipolar Plate Material for Polymer Electrolyte Membrane Fuel Cells

Heli Wang, John A. Turner

Research output: Contribution to journalArticlepeer-review

275 Scopus Citations

Abstract

Both interfacial contact resistance (ICR) measurements and electrochemical corrosion techniques were applied to ferritic stainless steels in a solution simulating the environment of a bipolar plate in a polymer electrolyte membrane fuel cell (PEMFC). Stainless steel samples of AISI434, AISI436, AISI441, AISI444, and AISI446 were studied, and the results suggest that AISI446 could be considered as a candidate bipolar plate material. In both polymer electrolyte membrane fuel cell anode and cathode environments, AISI446 steel underwent passivation and the passive films were very stable. An increase in the ICR between the steel and the carbon backing material due to the passive film formation was noted. The thickness of the passive film on AISI446 was estimated to be 2.6nm for the film formed at -0.1V in the simulated PEMFC anode environment and 3.0nm for the film formed at 0.6V in the simulated PEMFC cathode environment. Further improvement in the ICR will require some modification of the passive film, which is dominated by chromium oxide.

Original languageAmerican English
Pages (from-to)193-200
Number of pages8
JournalJournal of Power Sources
Volume128
Issue number2
DOIs
StatePublished - 2004

NREL Publication Number

  • NREL/JA-560-33634

Keywords

  • Bipolar plate
  • Ferrite
  • Passive film
  • PEMFC
  • Stainless steel

Fingerprint

Dive into the research topics of 'Ferritic Stainless Steels as Bipolar Plate Material for Polymer Electrolyte Membrane Fuel Cells'. Together they form a unique fingerprint.

Cite this