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 language | English |
|---|---|
| Pages (from-to) | 454-459 |
| Number of pages | 6 |
| Journal | Solid State Ionics |
| Volume | 262 |
| DOIs | |
| Publication status | Published - 2014 Sep 1 |
| Externally published | Yes |
Fingerprint
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
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 journal › Article
}
TY - JOUR
T1 - Effect of polarization on Sr and Zr diffusion behavior in LSCF/GDC/YSZ system
AU - Wang, Fangfang
AU - Brito, Manuel E.
AU - Yamaji, Katsuhiko
AU - Cho, Do Hyung
AU - Nishi, Mina
AU - Kishimoto, Haruo
AU - Horita, Teruhisa
AU - Yokokawa, Harumi
PY - 2014/9/1
Y1 - 2014/9/1
N2 - 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.
AB - 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.
KW - 10GDC interlayer
KW - OCV and polarization
KW - Solid oxide fuel cell (SOFC)
KW - Sr and Zr diffusion
UR - http://www.scopus.com/inward/record.url?scp=84903312793&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84903312793&partnerID=8YFLogxK
U2 - 10.1016/j.ssi.2014.04.002
DO - 10.1016/j.ssi.2014.04.002
M3 - Article
AN - SCOPUS:84903312793
VL - 262
SP - 454
EP - 459
JO - Solid State Ionics
JF - Solid State Ionics
SN - 0167-2738
ER -