ARTICLE pubs.acs.org/cm
Investigation of Microstructural and Electrochemical Properties of Impregnated (La,Sr)(Ti,Mn)O3(δ as a Potential Anode Material in High-Temperature Solid Oxide Fuel Cells Jung Hyun Kim,†,‡ David Miller,‡ Harald Schlegl,‡ Damien McGrouther,§ and John T. S. Irvine*,‡ †
Department of Applied Materials Engineering, Hanbat National University, San 16-1, Dukmyung-Dong, Yusung-Gu, Daejeon, 305-719, South Korea ‡ School of Chemistry, University of St. Andrews, North Haugh, St Andrews, Fife, KY16 9ST, Scotland, United Kingdom § SUPA, School of Physics and Astronomy, University of Glasgow, G12 8QQ, United Kingdom ABSTRACT: The microstructural and electrochemical properties of La0.4Sr0.6Ti0.8Mn0.2O3(δ (LSTM) fabricated via liquidphase impregnation have been investigated for solid oxide fuel cell (SOFC) applications. Scanning electron micrography (SEM) showed that LSTM uniformly covers the porous scaffold when heated in an oxidizing atmosphere, which transforms to fine particles when reduced. The electrical conductivity of a 10 wt % CeO2 50 wt % LSTM 8 mol % yttria-stabilized zirconia (8YSZ) composite anode was higher than that of a 50 wt % LSTM 8YSZ anode and was stable at 700, 800, and 900 °C under reducing conditions. When the 50 wt % LSTM-8YSZ was used as an anode, power densities of the sample were
