Highly stable La0.5Sr0.5Fe0.9Mo0.1O3-δ electrode for reversible symmetric solid oxide cells

被引：44

作者：

Bian, Liuzhen ^{[1
,2
]}

Liu, Changyang ^{[1
,2
]}

Li, Shuting ^{[1
,2
]}

Peng, Jun ^{[1
,2
]}

Li, Xiaowei ^{[3
]}

Guan, Lili ^{[1
,2
]}

Liu, Yuanyuan ^{[4
]}

Peng, Ji Hua ^{[1
,2
]}

An, Shengli ^{[1
,2
]}

Song, Xiwen ^{[1
,2
]}

机构：

[1] Inner Mongolia Univ Sci & Technol, Inner Mongolia Key Lab Adv Mat & Devices, Baotou 014010, Peoples R China

[2] Inner Mongolia Univ Sci & Technol, Sch Mat & Met, Baotou 014010, Peoples R China

[3] Inner Mongolia Univ Sci & Technol, Instrumental Anal Ctr, Baotou 014010, Peoples R China

[4] Inner Mongolia Univ Sci & Technol, Sch Chem & Chem Engn, Baotou 014010, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2020年 / 45卷 / 38期

关键词：

Symmetrical electrode; Reversible solid oxide cells; Electrolysis; Perovskite; HIGH-TEMPERATURE ELECTROLYSIS; HIGH-PERFORMANCE; OXYGEN-ELECTRODE; FUEL-CELLS; ANODE; CONDUCTIVITY; STABILITY;

D O I：

10.1016/j.ijhydene.2020.05.117

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：

Reversible solid oxide cells (RSOCs) using identical material as both fuel electrode and air electrode have received extensive attentions due to their simplified fabrication process, increased compatibility between electrolyte and electrode. In this work, Molybdenum doped La0.5Sr0.5Fe0.3Mo0.1O3-delta (LSFMo) symmetric electrode based on RSOCs is firstly designed and synthesized via sol-gel method. The effect of Molybdenum substitution at Fe- site on crystal structure, chemical stability, conductivity and electrochemical performance of La0.5Sr0.5FeO3-delta oxide is thoroughly investigated. The structural stability of La0.5Sr0.5FeO3-delta (LSF) in reducing condition is significantly enhanced after the incorporation of Mo5+/ 6+ and the conductivity in 5% H-2 for LSFMo is similar to 7 times higher than that of undoped LSF. In addition, the polarization resistance value at 850 degrees C based on LSFMo/LSGM/LSFMo is 0.08 and 0.09 Omega cm(2) in air and wet H-2, respectively. At 850 degrees C and 20%H2O-H-2, a peak power density of 640 mW cm(-2) is obtained in fuel cell mode, while a current density of -1000 mA cm(-2) is attained at 1.3 V in electrolysis mode. Finally, the symmetric cell exhibits an excellent cycling reversible operation in both SOFCs mode and SOECs mode without detectable degradation. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：19813 / 19822

页数：10

共 56 条

[1]

[Anonymous], 2004, LOS ALAMOS NATL LAB

[2] A symmetrical solid oxide fuel cell demonstrating redox stable perovskite electrodes [J].