A- and B-site doping effect on physicochemical properties of Sr2-xBax MMoO6 (M = Mg, Mn, Fe) double perovskites - candidate anode materials for SOFCs

作者：Zheng Kun^*; Swierczek Konrad

来源：Functional Materials Letters, 2016, 9(4): 1641002.

DOI：10.1142/S1793604716410022

• Anode materials
• double perovskite
• crystal structure
• transport properties
• chemical stability

In this work, we evaluate the physicochemical properties of Sr2-xBaxMMoO6 (M = Mg, Mn, Fe) double perovskites as alternative anode materials for solid oxide fuel cells, for which the effect of substitution of strontium by barium in a full range of compositions is studied. The crystal structure, microstructure, characterization of transport properties (electrical conductivity, Seebeck coefficient) and oxygen content as a function of temperature, as well as chemical stability in oxidizing and reducing conditions are discussed. Fe- and Mo-containing Sr2-xBaxFeMoO6 oxides show very high total conductivities with values of 100-1000 S.cm(-1), while Sr2-xBaxMgMoO6 present good redox stability.

• 出版日期2016-8