Song, Hwa Seob Min, Ji-Hyun Kim, Joosun Moon, Jooho 2024-01-20T21:05:22Z 2024-01-20T21:05:22Z 2021-09-03 2009-06-15 0378-7753 https://pubs.kist.re.kr/handle/201004/132390 The stability of Sm0.5Sr0.5CoO3 (SSC) under reduction conditions is investigated to determine whether it can be used as a cathode material in on-planar type, single-chamber, solid oxide fuel cells. The techniques of X-ray diffraction, X-ray photoelectron spectroscopy and scanning electron microscopy are used to reveal the reduction mechanism of SSC. Impedance spectroscopy analysis also provides a better understanding of the influence of decomposed SSC phases oil cathode performance. Decomposition of SSC occurs oil the surface by the formation of clot-shaped SrO. Co(OH)(2) and CoO oil lot) of the reduced SSC layer at 250 degrees C in 4% H2O-96% H-2- The SSC perovskite structure is destroyed at 350 degrees C ill pure hydrogen. There is a catastrophic microstructural change in which SSC is completely decomposed to SrO and CoO that cover the surface of Sm2O3. (C) 2009 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV OXIDATION METHANE ANODE SOFC Phase stability of Sm0.5Sr0.5CoO3 cathodes for on-planar type, single-chamber, solid oxide fuel cells Article 10.1016/j.jpowsour.2009.02.028 1 JOURNAL OF POWER SOURCES, v.191, no.2, pp.269 - 274 JOURNAL OF POWER SOURCES 191 2 269 274 scie scopus 000266673000010 2-s2.0-65649092192 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article OXIDATION METHANE ANODE SOFC Sm0.5Sr0.5CoO3 Decomposition Reduction mechanism Perovskite cathode Solid oxide fuel Cell