Electrochemical performance and stability of lanthanum strontium cobalt ferrite oxygen electrode with gadolinia doped ceria barrier layer for reversible solid oxide fuel cell

被引：87

作者：

Fan, Hui ^{[1
,2
]}

Keane, Michael ^{[2
]}

Singh, Prabhakar ^{[2
]}

Han, Minfang ^{[1
]}

机构：

[1] China Univ Min & Technol, Sch Chem & Environm Engn, Union Res Ctr Fuel Cell, Beijing 100083, Peoples R China

[2] Univ Connecticut, Ctr Clean Energy Engn, Storrs, CT 06269 USA

来源：

JOURNAL OF POWER SOURCES | 2014年 / 268卷

关键词：

Lanthanum strontium cobalt ferrite; Gadolinia doped ceria; Reversible solid oxide fuel cell; Solid oxide electrolysis cell; INTERMEDIATE-TEMPERATURE; COMPOSITE CATHODE; ANODE; HYDROGEN; SOFCS; YSZ; LSM; POLARIZATION; LSCF; BA0.5SR0.5CO0.8FE0.2O3-DELTA;

D O I：

10.1016/j.jpowsour.2014.03.080

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：

A La0.6Sr4Co0.2Fe0.8O3-delta (LSCF) oxygen electrode and a Gd0.1Ce0.9O2-delta (GDC) barrier layer are prepared for a reversible solid oxide fuel cell (RSOFC). Scanning electron microscopy (SEM) analysis shows that the GDC barrier layer has a honeycomb-like structure and maintains good adhesion with yttria-stabilized zirconia (YSZ) electrolyte and LSCF oxygen electrode. Polarization curves and electrochemical impedance spectra for both fuel cell and steam electrolysis modes are investigated. Repeated fuel cell/steam electrolysis cycles operated at 300 mA cm(-2) and 800 degrees C shows the cell has higher degradation under steam electrolysis mode than under fuel cell mode. Cell degradation in electrolysis mode is attributed to delamination of the GDC barrier layer from the YSZ electrolyte, which has been observed during post-test SEM analysis. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：634 / 639

页数：6

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