【摘 要】
：
La0.75Sr0.25CryMn1-yO3(LSCM) (y=0.0-0.6) composite oxides were synthesized by a complexing process of combining ethylene diamine tetraacetic acid (EDTA) and cit
【机 构】
：
State Key Laboratory of Materials-Oriented Chemical Engineering
论文部分内容阅读
La0.75Sr0.25CryMn1-yO3(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), temperamre-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 ≥ 0.4, the basic perovskite structure under the an-ode operating condition was sustained. A cell with 0.5-mm-thick scandia-stabilized zirconia electrolyte and La0.75Sr0.25CryMn1-yO3 anode de-livered a power density of～15 mW.cm-2 at 850℃.
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