Lee, Daehee Ahn, Sung-Jin Kim, Joosun Moon, Jooho 2024-01-20T18:31:28Z 2024-01-20T18:31:28Z 2021-09-05 2010-10-01 0378-7753 https://pubs.kist.re.kr/handle/201004/131017 Influences of feeding gas compositions on the performance of co-planar, single chamber solid oxide fuel cells (SC-SOFCs) are investigated with emphasis on the role of water vapor. The maximum open circuit voltage (OCV) and peak power density are obtained at a methane-to-oxygen ratio of 3.5 under the wet gas condition, and a stoichiometric ratio of 2.0 for methane partial oxidation under the dry gas condition. In addition to the partial oxidation of methane on the anode and electrocatalytic reactions, both steam reforming and methane combustion occur on the anode and cathode, respectively, in the presence of water vapor. Local volume expansion and a rise in temperature associated with these parasitic reactions intensify inter-mixing of the reactant and product gases by which the OCV and power density drastically deteriorate with decreasing anode-to-cathode gap distance, as confirmed by impedance analysis for the LSM-YSZ vertical bar YSZ vertical bar LSM-YSZ symmetrical cell. (C) 2010 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV PARTIAL OXIDATION METHANE SOFC AIR TEMPERATURE ELECTROLYTE MIXTURES GEOMETRY Influence of water vapor on performance of co-planar single chamber solid oxide fuel cells Article 10.1016/j.jpowsour.2010.03.101 1 JOURNAL OF POWER SOURCES, v.195, no.19, pp.6504 - 6509 JOURNAL OF POWER SOURCES 195 19 6504 6509 scie scopus 000279459500036 2-s2.0-77953138938 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article PARTIAL OXIDATION METHANE SOFC AIR TEMPERATURE ELECTROLYTE MIXTURES GEOMETRY Single chamber solid oxide fuel cell Reaction mechanism Water vapor Impedance analysis