Surface modification and performance of inexpensive Fe-based bipolar plates for proton exchange membrane fuel cells

Ching Yuan Bai, Tse M. Wen, Mao Suan Huang, Kung H. Hou, Ming D. Ger, Shuo J. Lee

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

A reforming pack chromization with rolling pretreatment process is utilized to develop inexpensive and high-performance Fe-based metal bipolar plates (SS 420, SS 430, and SS 316 stainless steels) for PEMFC systems. Rolling process is previously performed to reduce the chromizing temperature and generate a coating possessing excellent conductivity and corrosion resistance on the steels during chromization. The power efficiencies of rolled-chromized and simple chromized bipolar plates are compared with graphite bipolar plates employed in PEMFCs. The results show that the rolled-chromized bipolar plates have a corrosion current (Icorr) of 7.87 × 10-8 A cm-2 and an interfacial contact resistance of 9.7 mΩ cm2. Moreover, the power density of the single cell assembled with rolled-chromized bipolar plates is 0.46 W cm-2, which is very close to that of graphite (0.50 W cm-2), in the tested conditions of this study.

Original languageEnglish
Pages (from-to)5686-5691
Number of pages6
JournalJournal of Power Sources
Volume195
Issue number17
DOIs
Publication statusPublished - Sep 1 2010

Keywords

  • Bipolar plates
  • Fe-based alloys
  • Low-temperature pack chromization
  • Rolling

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Electrical and Electronic Engineering

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