A(2)MgMoO(6) (A = Sr,Ba) for use as sulfur tolerant anodes

作者：Howell T G^*; Kuhnell C P; Reitz T L; Sukeshini A M; Singh R N

来源：Journal of Power Sources, 2013, 231: 279-284.

DOI：10.1016/j.jpowsour.2013.01.004

• Solid oxide fuel cells
• Double perovskite
• Sulfur tolerant anode
• Sol-gel synthesis
• Sr2MgMoO6
• Ba2MgMoO6

The objective of this effort is to explore the substitution of the A-site in an A(2)MgMoO(6) perovskite with Sr and Ba to improve the sulfur tolerance of solid oxide fuel cells (SOFCs). Perovskites have demonstrated superior sulfur tolerance but lack the high conductivity and catalytic activity of Ni/YSZ cermets. Sr2MgMoO6, a double perovskite, has been suggested as a material of interest because of its relatively high conductivity and catalytic potential. This study summarizes the synthesis of A(2)MgMoO(6) (A = Sr,Ba) through sol-gel methods. The conductivity of the two samples was measured from thin pressed disks. Electrochemical performance of the specimens was performed by pasting the material onto an LSGM disk and stability was measured in sulfurous H-2 (140 ppm H2S). Both SMMO and BMMO demonstrated superior stability when exposed to 140 ppm of H2S as compared to Ni/YSZ, but did exhibit performance degradations due to sulfur accumulation in the buffer layer. Published by Elsevier B.V.

• 出版日期2013-6-1