Half-cell study of La and Ca doped strontium titanates anode for direct methane solid oxide fuel cell
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One of the major advantages of Solid oxide fuel cell (SOFC) over other fuel cell is use of direct natural gas at high temperature without any external reformer. Conventional nickel-yttria stabilized zirconia (Ni-YSZ) composite anode provides excellent catalytic property, current collection and stability for H2 oxidation but it is not tolerant towards sulphur poisoning and also accelerates coke deposition in presence of methane fuel. It necessitates the use of alternate anode for direct hydrocarbon fuel. In the present work, attempts have been made to apply La and Ca doped A-site deficient SrTiO3 (LSCTA-) as potential anode for direct methane SOFC. Low catalytic activity of LSCTA- is improved by infiltration of Ni and CeO2 catalyst. Half cell (YSZ/4%Ni-6%CeO2-LSCTA-) provided 200 mW cm-2 maximum power density and regain its initial performance in H2 even after 6 h exposure to humidified CH4 at 800 °C.
Tiwari , P K , Irvine , J T S & Basu , S 2017 , Half-cell study of La and Ca doped strontium titanates anode for direct methane solid oxide fuel cell . in S C Singhal & T Kawada (eds) , 15th International Symposium on Solid Oxide Fuel Cells (SOFC-XV) . ECS Transactions , no. 1 , vol. 78 , Electrochemical Society , pp. 1195-1203 , SOFC-XV: 15th International Symposium on Solid Oxide Fuel Cells July 23, 2017 - July 28, 2017 , Hollywood , United States , 23/07/17 . DOI: 10.1149/07801.1195ecstconference
15th International Symposium on Solid Oxide Fuel Cells (SOFC-XV)
© 2017 ECS - The Electrochemical Society. This work has been made available online in accordance with the publisher’s policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1149/07801.1195ecst
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