The influence of NiO content on ceramic-based solid oxide fuel cell anodes

Brian D. Madsen*, Scott A Barnett

*Corresponding author for this work

Research output: Contribution to conferencePaper

5 Scopus citations

Abstract

Solid oxide fuel cell (SOFC) anodes based on electronically conducting ceramics have potential advantages over conventional Ni-YSZ anodes, including better fuel flexibility, stability under redox cycling, and sulfur tolerance. Here we report small additions of NiO to anodes based on La0.8Sr 0.2Cr0.03V0.03O3 (LSCV) that also contained Ce0.9Gd0.1O1.95 (GDC), and describe results for these electrodes in SOFCs with GDC electrolyte supports. Microstructural evaluation showed a porous anode that varied significantly with anode firing temperature. Metallic Ni was observed in the anodes after reduction by x-ray diffraction for ≥ 5 weight percent NiO. Cell performance with hydrogen was evaluated using current-voltage measurements and electrochemical impedance spectroscopy (EIS) - total polarization resistance values at open circuit were ∼ 0.1 ωcm2 at 800°C for ≥ 2 weight percent NiO. The maximum power density of the SOFCs decreased sharply with decreasing NiO content from 5 to 0 weight%, however, little effect was observed from 5 to 20 weight% NiO.

Original languageEnglish (US)
Pages1185-1194
Number of pages10
StatePublished - Dec 1 2005
Event9th International Symposium on Solid Oxide Fuel Cells, SOFC IX - Quebec, Canada
Duration: May 15 2005May 20 2005

Other

Other9th International Symposium on Solid Oxide Fuel Cells, SOFC IX
CountryCanada
CityQuebec
Period5/15/055/20/05

ASJC Scopus subject areas

  • Engineering(all)

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    Madsen, B. D., & Barnett, S. A. (2005). The influence of NiO content on ceramic-based solid oxide fuel cell anodes. 1185-1194. Paper presented at 9th International Symposium on Solid Oxide Fuel Cells, SOFC IX, Quebec, Canada.