Accardo, Grazia Kim, Ghun Sik Ham, Hyung Chul Yoon, Sung Pil 2024-01-19T20:03:01Z 2024-01-19T20:03:01Z 2021-09-02 2019-05-03 0360-3199 https://pubs.kist.re.kr/handle/201004/120012 Lithium-gadolinium-doped ceria electrolytes (2-5 mol% of lithium) are prepared by fast and reliable one-pot sol gel combustion synthesis and sintered at low temperature. The aim is to improve the microstructure, electrochemical and power generation of electrolyte supported intermediate temperature solid oxide fuel cells. Time-of-flight coupled secondary ions mass spectroscopy and transmission electron microscopy reveal the uniform distribution of lithium and the structural modification and surface change induced by the doping. Lithium addition reduces the sintering temperature to 950 degrees C, and the electrochemical properties compared to the pure gadolinium doped ceria are highly superior. A maximum of 3.59.10(-2)-1.41.10(-1) S.cm(-1) for total conductivity are achieved for 3 mol.% of lithium addition at intermediate operative temperature range. An electrolyte-supported solid oxide fuel cell is then fabricated and tested in different gas conditions and operative temperatures. The maximum power density is 359 mW.cm(-2) at 668 mA.cm(-2) (750 degrees C). The results demonstrate the reliability, the short time-to-product and the feasibility of both synthesis cycle and electrolyte production for industrial application to develop a cost-effective and marketable fuel cell technology. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD ELECTRICAL-PROPERTIES RAPID DENSIFICATION SINTERING BEHAVIOR GRAIN-SIZE TEMPERATURE PERFORMANCE FILMS SOFC AID CONDUCTIVITY Optimized lithium-doped ceramic electrolytes and their use in fabrication of an electrolyte-supported solid oxide fuel cell Article 10.1016/j.ijhydene.2019.03.052 1 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.44, no.23, pp.12138 - 12150 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 44 23 12138 12150 scie scopus 000468710100071 2-s2.0-85063915214 Chemistry, Physical Electrochemistry Energy & Fuels Chemistry Electrochemistry Energy & Fuels Article ELECTRICAL-PROPERTIES RAPID DENSIFICATION SINTERING BEHAVIOR GRAIN-SIZE TEMPERATURE PERFORMANCE FILMS SOFC AID CONDUCTIVITY Impedance spectroscopy Low temperature SOFC Single cell performance Sol gel