Nickel-Gd-doped CeO2 cermet anode for intermediate temperature operating solid oxide fuel cells using LaGaO3-based perovskite electrolyte

Tatsumi Ishihara, Takaaki Shibayama, Hiroyasu Nishiguchi, Yusaku Takita

Research output: Contribution to journalArticlepeer-review

77 Citations (Scopus)

Abstract

Ni-CeO2 doped with 20 mol.% Gd3+ (GDC) cermet was investigated as the anode of an intermediate temperature operating solid oxide fuel cell using LaGaO3-based oxide electrolyte. It was found that the anodic overpotential decreased by mixing Ni with mixed electronic-ionic conductor, in-particular, mixing with doped CeO2 is the most effective for decreasing the overpotential of the anode. Anodic overpotential became a minimum at 10 vol.% GDC to NiO. Using Ni-GDC cermet is also effective for improving the stability of the power density at the constant current output. Impedance analysis suggests that the improvement of anodic activity by mixing Ni with GDC was brought about by decreasing the diffusion overpotential, which was a result of the enlarged effective electrode area.

Original languageEnglish
Pages (from-to)209-216
Number of pages8
JournalSolid State Ionics
Volume132
Issue number3
DOIs
Publication statusPublished - Jul 2 2000
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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