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

doi:10.1016/j.ssi.2014.04.002

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

システムデザイン工学科

研究成果: Article › 査読

80 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
巻	262
DOI	https://doi.org/10.1016/j.ssi.2014.04.002
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

文献へのアクセス

10.1016/j.ssi.2014.04.002

他のファイルとリンク

引用スタイル

@article{7ed100c8c3904518be42367a3549ec2a,

title = "Effect of polarization on Sr and Zr diffusion behavior in LSCF/GDC/YSZ system",

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.",

keywords = "10GDC interlayer, OCV and polarization, Solid oxide fuel cell (SOFC), Sr and Zr diffusion",

author = "Fangfang Wang and Brito, {Manuel E.} and Katsuhiko Yamaji and Cho, {Do Hyung} and Mina Nishi and Haruo Kishimoto and Teruhisa Horita and Harumi Yokokawa",

note = "Funding Information: The work was financially supported by the New Energy and Industrial Technology Development Organization (NEDO) of Japan.",

year = "2014",

month = sep,

day = "1",

doi = "10.1016/j.ssi.2014.04.002",

language = "English",

volume = "262",

pages = "454--459",

journal = "Solid State Ionics",

issn = "0167-2738",

publisher = "Elsevier",

}

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

N1 - Funding Information: The work was financially supported by the New Energy and Industrial Technology Development Organization (NEDO) of Japan.

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

SN - 0167-2738

VL - 262

SP - 454

EP - 459

JO - Solid State Ionics

JF - Solid State Ionics

ER -

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

抄録

ASJC Scopus subject areas

文献へのアクセス

他のファイルとリンク

フィンガープリント

引用スタイル