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

研究成果: Article

摘要

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.

原文English
文章編號SDDG03
期刊Japanese Journal of Applied Physics
58
發行號SD
DOIs
出版狀態Published - 2019 一月 1

指紋

densification
Solid oxide fuel cells (SOFC)
Solid state reactions
Densification
Perovskite
Anodes
anodes
Crystallization
crystallization
solid state
conduction
augmentation
Particle size
routes
Transmission electron microscopy
Powders
atmospheres
heat
conductivity
transmission electron microscopy

All Science Journal Classification (ASJC) codes

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

引用此文

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title = "Enhancement on densification and crystallization of conducting La0.7Sr0.3VO3 perovskite anode derived from hydrothermal process",
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.",
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AU - Tsai, Shu Yi

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AU - Fung, Kuan Zong

AU - Cho, Chun Yao

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AB - 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.

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