Stable power generation using a solid oxide fuel cell with a Ni/Gd-doped CeO2 Cermet anode in 100% dry-CH4 fuel based on the anode reaction mechanism

Manabu Ihara, Keisuke Matsuda, Chiaki Yokoyama

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Stable power generation from a solid oxide fuel cell (SOFC) with a Ni/ Gd-doped CeO2 Cermet (GDC) anode in 100% dry-methane (CH4) fuel was achieved at a maximum power density of 170 mW/cm2 at 900 °C. The SOFC did not degrade even after 120 h of operation. The DC polarization of the Ni/GDC anode in hydrogen (H2) fuel and in 4.5% dry-methane fuel was measured by the current interruption method and then compared with those of Ni/YSZ, Pt/YSZ and Pt anodes. The apparent reaction orders of the oxygen activity for Ni/GDC anodes in both hydrogen fuel and 4.5% dry-methane fuel were smaller than those for Ni/YSZ, Pt/YSZ, and Pt anodes. Based on the previously proposed anode reaction mechanism for Ni/YSZ and Pt/YSZ anodes in hydrogen fuel and 4.5% dry-methane fuel, the stable power generation of the SOFC with the Ni/GDC anode in 100% dry-methane fuel was probably due to the high equilibrium constant between the oxygen in YSZ and the oxygen on the three-phase boundary on the anodes.

Original languageEnglish
Pages (from-to)208-213
Number of pages6
Journalkagaku kogaku ronbunshu
Volume29
Issue number2
DOIs
Publication statusPublished - 2003 Mar

Keywords

  • Anode reaction
  • Dry methane fuel
  • Fuel cell
  • Solid oxide

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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