Performance degradation of double-perovskite PrBaCo2O5+δ oxygen electrode in CO2 containing atmospheres

被引：42

作者：

Zhu, Lin ^{[1
]}

Wei, Bo ^{[1
]}

Lu, Zhe ^{[1
]}

Feng, Jiebing ^{[1
]}

Xu, Lingling ^{[2
]}

Gao, Hong ^{[2
]}

Zhang, Yaohui ^{[1
]}

Huang, Xiqiang ^{[1
]}

机构：

[1] Harbin Inst Technol, Dept Phys, Harbin 150080, Peoples R China

[2] Harbin Normal Univ, Sch Phys & Elect Engn, Key Lab Photon & Elect Bandgap Mat, Minist Educ, Harbin 150025, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2017年 / 416卷

基金：

中国国家自然科学基金;

关键词：

Solid oxide fuel cells; PrBaCo2O5+delta; Segregation; BaCO3; Performance degradation; OXIDE FUEL-CELLS; THIN-FILM ELECTRODES; CATHODES; SEGREGATION; REDUCTION; MEMBRANES; LNBACO(2)O(5+DELTA); DEACTIVATION; STABILITY; MECHANISM;

D O I：

10.1016/j.apsusc.2017.03.298

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The electrochemical performance and microstructure stability of PrBaCo2O5+delta (PBCO) cathode are investigated in CO2-containing atmospheres for solid oxide fuel cells (SOFCs). Electrochemical impedance spectra results confirm obvious performance degradation of the PBCO cathodes in the presence of CO2 impurity, especially in high CO2 concentration condition. Microstructure and structural analyses reveal the formation of insulating BaCO3 nanoparticles at the PBCO surface, which is considered as the primary reason for the loss of electrode activity. This study highlights the important role of surface segregated BaO species in determining the activity and long-time stability of PBCO electrode. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：649 / 655

页数：7

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