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

Research output: Contribution to journalArticle

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

Fingerprint

Yttria stabilized zirconia
Solid oxide fuel cells (SOFC)
Electrolytes
Spectroscopy
Lanthanum
Strontium
Inductively coupled plasma
Oxygen vacancies
Ionic conductivity
Perovskite
Temperature
Ferrite
Fuel cells
Hydrogen
Cobalt
Anodes
Cathodes
Permittivity
X ray photoelectron spectroscopy
Crystalline materials

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

BiFeO 3 /YSZ bilayer electrolyte for low temperature solid oxide fuel cell. / Tu, Yu Chieh; Chang, Chih Yu; Wu, Ming Chung; Shyue, Jing Jong; Su, Wei Fang.

In: RSC Advances, Vol. 4, No. 38, 01.01.2014, p. 19925-19931.

Research output: Contribution to journalArticle

Tu, Yu Chieh ; Chang, Chih Yu ; Wu, Ming Chung ; Shyue, Jing Jong ; Su, Wei Fang. / BiFeO 3 /YSZ bilayer electrolyte for low temperature solid oxide fuel cell. In: RSC Advances. 2014 ; Vol. 4, No. 38. pp. 19925-19931.
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