Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 38, Issue 11, Pages 4734-4739Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2013.01.143
Keywords
Proton exchange membrane fuel cell (PEMFC); Bipolar plate; Stainless steel; Nitride; Nitridation; Corrosion
Categories
Funding
- United States Department of Energy (US DOE), Energy Efficiency and Renewable Energy Fuel Cells Technologies Program
- ORNL's Shared Research Equipment (ShaRE) User Program
- Office of Basic Energy Sciences, the U.S. Department of Energy
- US Department of Energy [DE-AC05-00OR22725]
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A manufacturing and single-cell fuel cell performance study of stamped, laser welded, and gas nitrided ferritic stainless steel foils in an advanced automotive bipolar plate assembly design was performed. Two developmental foil compositions were studied: Fe-20Cr-4V and Fe-23Cr-4V wt.%. Foils 0.1 mm thick were stamped and then laser welded together to create single bipolar plate assemblies with cooling channels. The plates were then surface treated by pre-oxidation and nitridation in N-2-4H(2) based gas mixtures using either a conventional furnace or a short-cycle quartz lamp infrared heating system. Single-cell fuel cell testing was performed at 80 degrees C for 500 h at 0.3 A/cm(2) using 100% humidification and a 100%/40% humidification cycle that stresses the membrane and enhances release of the fluoride ion and promotes a more corrosive environment for the bipolar plates. Periodic high frequency resistance potential-current scans during the 500 h fuel cell test and post-test analysis of the membrane indicated no resistance increase of the plates and only trace levels of metal ion contamination. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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