Effect of polarization on Sr and Zr diffusion behavior in LSCF/GDC/YSZ system

Fangfang Wang, Manuel E. Brito, Katsuhiko Yamaji, Do Hyung Cho, Mina Nishi, Haruo Kishimoto, Teruhisa Horita, Harumi Yokokawa

Research output: Contribution to journalArticle

55 Citations (Scopus)

Abstract

To accurately evaluate the role as diffusion barrier of gadolinia-doped ceria (GDC) interlayer, often used in real stacks of solid oxide fuel cells, the cation diffusion behavior in a LSCF/GDC/YSZ system was investigated. Diffusion under open circuit voltage (OCV) and cathodic polarization conditions was evaluated using pellet-type cells in which a dense GDC interlayer, about 1 μm in thickness, was prepared by pulse laser deposition (PLD). Results clearly show that under polarization, SrZrO3 formation along both LSCF/GDC and GDC/YSZ interfaces is accelerated. The enhancement of Sr diffusion during cathodic polarization is explained by a shift to higher values of the thermodynamic activity of Sr at the LSCF/GDC interface that also leads to a decrease in oxygen potential.

Original languageEnglish
Pages (from-to)454-459
Number of pages6
JournalSolid State Ionics
Volume262
DOIs
Publication statusPublished - 2014 Sep 1
Externally publishedYes

Fingerprint

Gadolinium
Cerium compounds
gadolinium
yttria-stabilized zirconia
Polarization
polarization
Cathodic polarization
interlayers
laser deposition
Diffusion barriers
Open circuit voltage
solid oxide fuel cells
Solid oxide fuel cells (SOFC)
open circuit voltage
pellets
gadolinium oxide
Cations
Laser pulses
Positive ions
Thermodynamics

Keywords

  • 10GDC interlayer
  • OCV and polarization
  • Solid oxide fuel cell (SOFC)
  • Sr and Zr diffusion

ASJC Scopus subject areas

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

Cite this

Wang, F., Brito, M. E., Yamaji, K., Cho, D. H., Nishi, M., Kishimoto, H., ... Yokokawa, H. (2014). Effect of polarization on Sr and Zr diffusion behavior in LSCF/GDC/YSZ system. Solid State Ionics, 262, 454-459. https://doi.org/10.1016/j.ssi.2014.04.002

Effect of polarization on Sr and Zr diffusion behavior in LSCF/GDC/YSZ system. / Wang, Fangfang; Brito, Manuel E.; Yamaji, Katsuhiko; Cho, Do Hyung; Nishi, Mina; Kishimoto, Haruo; Horita, Teruhisa; Yokokawa, Harumi.

In: Solid State Ionics, Vol. 262, 01.09.2014, p. 454-459.

Research output: Contribution to journalArticle

Wang, F, Brito, ME, Yamaji, K, Cho, DH, Nishi, M, Kishimoto, H, Horita, T & Yokokawa, H 2014, 'Effect of polarization on Sr and Zr diffusion behavior in LSCF/GDC/YSZ system', Solid State Ionics, vol. 262, pp. 454-459. https://doi.org/10.1016/j.ssi.2014.04.002
Wang F, Brito ME, Yamaji K, Cho DH, Nishi M, Kishimoto H et al. Effect of polarization on Sr and Zr diffusion behavior in LSCF/GDC/YSZ system. Solid State Ionics. 2014 Sep 1;262:454-459. https://doi.org/10.1016/j.ssi.2014.04.002
Wang, Fangfang ; Brito, Manuel E. ; Yamaji, Katsuhiko ; Cho, Do Hyung ; Nishi, Mina ; Kishimoto, Haruo ; Horita, Teruhisa ; Yokokawa, Harumi. / Effect of polarization on Sr and Zr diffusion behavior in LSCF/GDC/YSZ system. In: Solid State Ionics. 2014 ; Vol. 262. pp. 454-459.
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