Investigating the degradation mechanism of the solid oxide fuel cell nickel-yttria stabilized zirconia anode under siloxane contamination

Jiashen Tian, Ryan J. Milcarek

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

In order to investigate the solid oxide fuel cell nickel-yttria stabilized zirconia (Ni-YSZ) anode degradation mechanism due to poisoning by Octamethylcyclotetrasiloxane (D4), four different experiments utilizing H2+H2O, H2+H2O+D4, H2+D4 and H2+CO+D4 as fuels at 750 °C are conducted in this study. The electrochemical characterization and morphology results are analyzed and compared for anode degradation phenomenon. The results contradict the previously proposed degradation mechanism as the experimental results show that water can inhibit the silicon deposition and anode degradation. Based on the experimental results in this study and previous studies about siloxane deposition on metal oxides, a new anode degradation mechanism is proposed. The proposed degradation mechanism for siloxane is due to siloxane adsorption resulting in silicon deposition and carbon deposition after siloxane decomposition.

Original languageEnglish (US)
Article number229122
JournalJournal of Power Sources
Volume480
DOIs
StatePublished - Dec 31 2020

Keywords

  • Biogas
  • Carbon deposition
  • Contamination
  • Degradation
  • Siloxane
  • Solid oxide fuel cell (SOFC)

ASJC Scopus subject areas

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

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