Anode-supported SOFCs with Y 2O 3-doped Bi 2O 3/Gd 2O 3-Doped CeO 2 composite electrolyte film

Y. J. Leng, S. H. Chan

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Abstract

Anode-supported solid oxide fuel cells (SOFCs) with a bilayered yttria-doped bismuth (YDB) and gadolinia-doped ceria (GDC) composite electrolyte film were developed. The cell with an YDB/GDC composite electrolyte film (84 μm GDC+16 μm YDB) showed an increase of 68-96 mV in open-circuit voltage in the operating temperature range of 700-500°C, compared with that with a single GDC electrolyte film (∼99 μm). Using Pt as the cathode, the cell with the YDB/GDC composite electrolyte also showed much lower electrode polarization resistance than that with the single GDC electrolyte and almost the same ohmic resistance as the latter. As a result of the combined effects of these factors, the cell with an YDB/GDC composite electrolyte can achieve 0.6∼1.5 times higher maximum power density than that with a single GDC electrolyte in the operating temperature range of 700-500°C.

Original languageEnglish (US)
Pages (from-to)A56-A59
JournalElectrochemical and Solid-State Letters
Volume9
Issue number2
DOIs
StatePublished - 2006

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering

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