Choi, Yun-Gyeom Park, Jun-Young Son, Ji-Won Lee, Jong-Ho Je, Hae-June Kim, Byung-Kook Lee, Hae-Weon Yoon, Kyung Joong 2024-01-20T11:35:01Z 2024-01-20T11:35:01Z 2021-09-05 2013-08-06 0360-3199 https://pubs.kist.re.kr/handle/201004/127780 High performance solid oxide fuel cells (SOFCs) based on gadolinia-doped ceria (GDC) electrolyte are demonstrated for intermediate temperature operation. The inherent technical limitations of the GDC electrolyte in sinterability and mechanical properties are overcome by applying sol-gel coating technique to the screen-printed film. When the quality of the electrolyte film is enhanced by the additional sol gel coating, the OCV and maximum power density increase from 0.73 to 0.90 V and from 0.55 to 0.95 W cm(-2), respectively, at 650 degrees C with humidified hydrogen (3% H2O) as fuel and air as oxidant. The impedance analysis reveals that the reinforcement of the thin electrolyte with sol-gel coating significantly reduces the polarization resistance. Elementary reaction steps for the anode and cathode are analyzed based on the systematic impedance study, and the relation between the structural integrity of the electrolyte and the electrode polarization is discussed in detail. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD ELECTROCHEMICAL CHARACTERIZATION CE0.9GD0.1O1.95 ELECTROLYTE SILICA-GEL ANODE PERFORMANCE POLARIZATION FABRICATION ADDITIVES OXIDATION KINETICS Ceria-based electrolyte reinforced by sol-gel technique for intermediate-temperature solid oxide fuel cells Article 10.1016/j.ijhydene.2013.05.161 1 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.38, no.23, pp.9867 - 9872 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 38 23 9867 9872 scie scopus 000322500800029 2-s2.0-84880167673 Chemistry, Physical Electrochemistry Energy & Fuels Chemistry Electrochemistry Energy & Fuels Article ELECTROCHEMICAL CHARACTERIZATION CE0.9GD0.1O1.95 ELECTROLYTE SILICA-GEL ANODE PERFORMANCE POLARIZATION FABRICATION ADDITIVES OXIDATION KINETICS Gadolinia-doped ceria Electrolyte Sol-gel Impedance spectroscopy Solid oxide fuel cells