4.3 Article Proceedings Paper

Enhancement on densification and crystallization of conducting La0.7Sr0.3VO3 perovskite anode derived from hydrothermal process

Journal

JAPANESE JOURNAL OF APPLIED PHYSICS
Volume 58, Issue -, Pages -

Publisher

IOP PUBLISHING LTD
DOI: 10.7567/1347-4065/ab0df0

Keywords

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Funding

  1. Ministry of Science and Technology Taiwan [MOST-105-2923-E-006 -004 -MY3]
  2. Hierarchical Green-Energy Materials (Hi-GEM) Research Center from The Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education (MOE) in Taiwan

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La1-xSrxVO3 (LSV)-based perovskite anodes are chemically and electrochemically stable under SOFC operating conditions. The main objective of this study was to investigate the feasibility of obtaining La0.7Sr0.3VO3 nanopowder from a novel hydrothermal method at relative low-temperature (similar to 200 degrees C). The particle size of hydrothermally-processed La0.7Sr0.3VO3 powder was as fine as 50 nm based on transmission electron microscopy observation. As a result, the better crystallization and densification was demonstrated from La0.7Sr0.3VO3 nanopowders synthesized via a hydrothermal route in comparison with a solid-state reaction (SSR) method. La0.7Sr0.3VO3 nanopowder shows a perovskite-type structure after heat-treated at 800 degrees C for 5 h in a reducing atmosphere (20% H-2, 80% Ar). The hydrothermally treated La0.7Sr0.3VO3 showed high density of 96% that is better than the SSR process (86%). La0.7Sr0.3VO3 synthesized by the hydrothermal process shows metallic conducting behavior. Its conductivity reached 193 s cm(-1) at 800 degrees C which is adequate for SOFC application. (c) 2019 The Japan Society of Applied Physics

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