Journal
CERAMICS INTERNATIONAL
Volume 39, Issue 6, Pages 6343-6353Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2013.01.060
Keywords
Strontium titanate; E Solid oxide fuel cells; Carbon deposition; Oxide anodes
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Funding
- Fundamental R&D Program for Core Technology of Materials
- Ministry of Knowledge Economy, Republic of Korea
- Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Korea government Ministry of Knowledge Economy [20114030200060]
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Sr0.4La0.6Ti1-xMnxO3-delta with rhombohedral structure has been investigated in terms of their electrochemical performance, redox stability, and electro-catalytic properties for solid oxide fuel cell anodes. The performance of Sr0.4La0.6Ti1-xMnxO3-delta anodes for solid oxide fuel cells strongly depends on the Mn substitution at the B-site of the perovskites. Electrical conductivity of Sr0.4La0.6Ti1-xMnxO3-delta increases with increasing Mn content. X-ray photoelectron spectroscopy analysis reveals that the amount of Mn3+ and Ti3+, which is an electronic charge carrier, increases with Mn doping. The reduced anode powders with high Mn/Ti ratio show oxygen storage capability and a low carbon deposition rate. Linear thermal expansion coefficients of Sr0.4La0.6Ti1-xMnxO3-delta anodes range from 9.46 x 10(-6) K-1 to 11.3 x 10(-6) K-1. The maximum power densities of the single cell with the Sr0.4La0.6Ti0.2Mn0.8O3-delta anode in humidified H-2 and CH4 at 800 degrees C are 0.29 W cm(-2) and 0.24 W cm(-2), respectively. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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