Optimization of Ferritic Steel Porous Supports for Protonic Fuel Cells Working at 600°C

Vinothini Venkatachalam, Sebastian Molin, Ming Chen, I. Smirnov, P.-O. Larsson, Peter Vang Hendriksen, Nikolaos Bonanos

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Abstract

Metal supported protonic fuel cells (PCFC) offer one major advantage over standard solid oxide fuel cells (SOFC) with oxygen conducting electrolytes, namely that the product, water, is produced on the cathode (air) side. This feature simplifies the engineering of the stack, boosts efficiency, and is particularly helpful for a porous metal supported cell because it limits the corrosion of the metal by exposure to water vapor in the anode gas.
In this work, we show the effect of composition and microstructure on the high temperature corrosion and phase stability (formation of sigma phase/Laves phase) of porous alloys. Alloys in the compositional range Fe-20%Cr to Fe-32%Cr were evaluated and the effects of surface modification on corrosion resistance were studied using thermogravimetry, x-ray diffractometry and electron microscopy. The results show that surface modified porous ferritic steels are very promising materials for cost effective protonic fuel cells operating at 600°C.
Original languageEnglish
Title of host publicationProceedings of the Materials Science and Technology 2014 Conference
Number of pages9
PublisherASM International
Publication date2014
Pages1231-1239
ISBN (Electronic)978-0-87339-763-6
Publication statusPublished - 2014
Event Materials Science and Technology 2014 Conference - David L. Lawrence Convention Center, Pittsburgh, PA, United States
Duration: 12 Oct 201416 Oct 2014

Conference

Conference Materials Science and Technology 2014 Conference
LocationDavid L. Lawrence Convention Center
CountryUnited States
CityPittsburgh, PA
Period12/10/201416/10/2014

Keywords

  • SOFC
  • Protonic fuel cell
  • Metal supports
  • Porous alloys
  • Corrosion
  • Protective coating

Cite this

Venkatachalam, V., Molin, S., Chen, M., Smirnov, I., Larsson, P-O., Hendriksen, P. V., & Bonanos, N. (2014). Optimization of Ferritic Steel Porous Supports for Protonic Fuel Cells Working at 600°C. In Proceedings of the Materials Science and Technology 2014 Conference (pp. 1231-1239). ASM International.