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

Chi Yang Liu, Shu Yi Tsai, Chung Ta Ni, Kuan Zong Fung, Chun Yao Cho

Research output: Contribution to journalArticle

Abstract

La1-xSr x VO3 (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 (∼200 °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 °C for 5 h in a reducing atmosphere (20% H2, 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 °C which is adequate for SOFC application.

Original languageEnglish
Article numberSDDG03
JournalJapanese Journal of Applied Physics
Volume58
Issue numberSD
DOIs
Publication statusPublished - 2019 Jan 1

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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