TY - JOUR
T1 - Cr doping effect in B-site of La0.75Sr0.25MnO 3 on its phase stability and performance as an SOFC anode
AU - Zheng, Yao
AU - Ran, Ran
AU - Shao, Zongping
PY - 2009/8
Y1 - 2009/8
N2 - 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 La0.75Sr0.25MnO 3 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 ≥ 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 La 0.75Sr0.25Cr y Mn1-y O3 anode delivered a power density of ∼15 mW•cm-2 at 850°C.
AB - 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 La0.75Sr0.25MnO 3 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 ≥ 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 La 0.75Sr0.25Cr y Mn1-y O3 anode delivered a power density of ∼15 mW•cm-2 at 850°C.
KW - Anode materials
KW - Perovskite structure
KW - Phase stability
KW - Solid oxide fuel cells (SOFC)
UR - http://www.scopus.com/inward/record.url?scp=74249085734&partnerID=8YFLogxK
U2 - 10.1007/s12598-009-0072-9
DO - 10.1007/s12598-009-0072-9
M3 - 文章
AN - SCOPUS:74249085734
SN - 1001-0521
VL - 28
SP - 361
EP - 366
JO - Rare Metals
JF - Rare Metals
IS - 4
ER -