BiFeO 3 /YSZ bilayer electrolyte for low temperature solid oxide fuel cell

Yu Chieh Tu, Chih Yu Chang, Ming Chung Wu, Jing Jong Shyue, Wei Fang Su

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2 Citations (Scopus)

Abstract

We have demonstrated BiFeO 3 (BFO) as a potential bilayer electrolyte for 650°C low temperature solid oxide fuel cell application. The stoichiometric perovskite BFO is synthesized by wet chemistry, calcined at 500°C and sintered at 850 °C. The crystalline structure is confirmed by X-ray diffraction spectroscopy, the atomic ratios (Bi:Fe) of 1.02 and 1.00 are determined by X-ray energy dispersive spectroscopy and inductively coupled plasma-mass spectroscopy, respectively. The X-ray photoelectron spectroscopy analysis indicates the presence of oxygen vacancies which can partially reduce Fe 3+ and result in relatively high dielectric constant (6252 at 100 kHz) and ionic conductivity (>10 -2 S cm -1 at 650 °C). The BFO is coated with an yttria-stabilized zirconia (YSZ) protective layer to avoid hydrogen reduction of BFO. This bilayer electrolyte exhibits a 1.6 times increase in maximum power density as compared with pure YSZ when a Ni-YSZ anode and lanthanum strontium cobalt ferrite (LSCF) cathode are used in the fuel cell at 650 °C.

Original languageEnglish
Pages (from-to)19925-19931
Number of pages7
JournalRSC Advances
Volume4
Issue number38
DOIs
Publication statusPublished - Jan 1 2014
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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  • Cite this

    Tu, Y. C., Chang, C. Y., Wu, M. C., Shyue, J. J., & Su, W. F. (2014). BiFeO 3 /YSZ bilayer electrolyte for low temperature solid oxide fuel cell. RSC Advances, 4(38), 19925-19931. https://doi.org/10.1039/c4ra01862a