Synthesis and Characterization of La1-xSrxFe1-yMnyO3-δ for SOFC Cathode Materials
The solid oxide fuel cell technology offers substantial potential for clean and efficient power generation. La1-xSrxFe1-yMnyO3-δ(LSFM) perovskites are potential materials used as cathode for intermediate temperature solid oxide fuel cell (ITSOFC). They ( x = 0.1, 0.2, 0.3 and 0.4; y = 0.1, 0.2 and 0.3 ) were synthesized by a citrate method. The formed process of perovskite structure was analyzed using TG/DTA analysis. XRD showed the optimum formation of a single perovskite phase is 800℃. Electrical conductivity was measured by a four-probe DC method and La0.6Sr0.4Fe0.9Mn0.1O3-δ shows the highest conductivity. The oxygen nonstoichiometry was measured by lodometric method. These perovskites display the oxygen deficient composition. LSFM, with increasing the number of Sr and Fe, increase the amount of oxygen vacancies. The synthesized La0.6Sr0.4Fe0.9Mn0.1O3-δ and La0.9Sr0.1Ga0.8Mg0.2O3-δ are chemically and thermally compatible well in XRD and SEM results. In conclusion, the LSFM can be considered as a promising cathode material for ITSOFC.
citrate method LSFM perovskites cathodes electrical conductivity compatibility
QIN Bo MA Wen-hui YANG Bin LIU Da-chun DAI Yong-nian
Research Institute of Vacuum Metallurgy and Materials, Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology, Kunming 650093, China
国际会议
北京
英文
141-143
2006-08-03（万方平台首次上网日期，不代表论文的发表时间）