Accardo, Grazia Dell'Agli, Gianfranco Spiridigliozzi, Luca Yoon, Sung Pil Frattini, Domenico 2024-01-19T17:02:39Z 2024-01-19T17:02:39Z 2021-09-05 2020-07-31 0360-3199 https://pubs.kist.re.kr/handle/201004/118351 Praseodymium-doped ceria electrolyte powders are synthesized by a co-precipitation method using ammonium carbonate in little excess to fabricate a stable electrolytesupported solid oxide fuel cell able to operate in hydrogen conditions. Raman and X-ray Photoelectron Spectroscopy are employed for the electrolyte characterization to check the distribution of vacancies and the initial oxidation state of Pr that influences the transport mechanism under the real operation of SOFCs. The optimum Pr concentration in the electrolyte is found to be 6 mol% of Pr and 14 mol% of Gd (sample 6Pr). The electrolytesupported cells fabricated with this composition are sintered at 1250 degrees C for 3 h and tested in different gas conditions and operating temperatures, showing a maximum power density of 305.31 mW.cm-2 at 530.36 mA-cm-2 (750 degrees C) in wet hydrogen conditions. Compared to standard cells fabricated with a gadolinium-doped ceria electrolyte sintered at 1500 degrees C, the 6Pr has long term stability performances with a power density loss of 17% after 100 h of operation. The results demonstrate the eligible use of this electrolyte under real operating environments. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD PRASEODYMIUM DOPED CERIA OPEN-CIRCUIT VOLTAGE ELECTRICAL-PROPERTIES CHEMICAL EXPANSION IN-SITU TEMPERATURE SOFC PERFORMANCE FABRICATION CONDUCTIVITY On the oxygen vacancies optimization through Pr co-doping of ceria-based electrolytes for electrolyte-supported solid oxide fuel cells Article 10.1016/j.ijhydene.2020.05.011 1 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.45, no.38, pp.19707 - 19719 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 45 38 19707 19719 scie scopus 000552053500081 2-s2.0-85085319236 Chemistry, Physical Electrochemistry Energy & Fuels Chemistry Electrochemistry Energy & Fuels Article PRASEODYMIUM DOPED CERIA OPEN-CIRCUIT VOLTAGE ELECTRICAL-PROPERTIES CHEMICAL EXPANSION IN-SITU TEMPERATURE SOFC PERFORMANCE FABRICATION CONDUCTIVITY Fuel cells Ionic conduction Rare earth compounds Electrochemical impedance spectroscopy Electrolyte-supported cell