Cr doping effect in B-site of La0.75Sr0.25MnO3 on its phase stability and performance as an SOFC anode

被引：18

作者：

Zheng Yao ^{[1
]}

Ran Ran ^{[1
]}

Shao Zongping ^{[1
]}

机构：

[1] Nanjing Univ Technol, State Key Lab Mat Oriented Chem Engn, Nanjing 210009, Peoples R China

来源：

RARE METALS | 2009年 / 28卷 / 04期

基金：

中国国家自然科学基金;

关键词：

solid oxide fuel cells (SOFC); anode materials; phase stability; perovskite structure; OXIDE FUEL-CELL; DIRECT OXIDATION; COMPOSITE ANODE; METHANE; LA1-XSRXCR1-YRUYO3-DELTA; CONDUCTIVITY; STATE;

D O I：

10.1007/s12598-009-0072-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

La0.75Sr0.25Cr (y) Mn1-y O-3 (LSCM) (y = 0.0-0.6) composite oxides were synthesized by a complexing process of combining ethylene diamine tetraacetic acid (EDTA) and citrate. X-ray diffraction (XRD), temperature-programmed reduction, electrical conductivity, I-V polarization, and impedance spectroscopy were conducted to investigate the Cr doping effect of La0.75Sr0.25MnO3 on its phase stability and electrochemical performance as a solid-oxide fuel cell (SOFC) anode. The chemical and structural stabilities of the oxides increased steadily with increasing Cr doping concentration, while the electrical conductivity decreased on the contrary. At y a parts per thousand yen 0.4, the basic perovskite structure under the anode operating condition was sustained. a cell with 0.5-mm-thick scandia-stabilized zirconia electrolyte and La0.75Sr0.25Cr (y) Mn1-y O-3 anode delivered a power density of similar to 15 mW center dot cm(-2) at 850A degrees C.

引用

页码：361 / 366

页数：6