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

研究成果: Article査読

73 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)454-459
ページ数6
ジャーナルSolid State Ionics
262
DOI
出版ステータスPublished - 2014 9月 1

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料科学(全般)
  • 凝縮系物理学

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