Electrical conductivity of Sr2MgMoO6−¤ for solid oxide fuel cell anodes

• SASAKI Kazuya

  Graduate School of Science and Engineering, Hirosaki University

• SHIN-MURA Kiyoto

  Graduate School of Engineering, Tokai University

書誌事項

タイトル別名

• Electrical conductivity of Sr₂MgMoO_6−δ for solid oxide fuel cell anodes
• Electrical conductivity of Sr₂MgMoO_{6−δ} for solid oxide fuel cell anodes

抄録

A high purity powder of Sr₂MgMoO_6−δ (SMM) was synthesized by a solid-state reaction under atmosphere-controlled conditions. The powder was sintered at a relatively low temperature (1200°C) to prepare compacts with high grain boundary density. SMM is a promising anode material for solid oxide fuel cells and hence, the samples were characterized under conditions relevant to this application. The electrical conductivity values of SMM under various oxygen partial pressures (p_O2 = 10⁻¹⁵–10^4.3 Pa) over the temperature range of 300–850°C were measured by AC impedance spectroscopy. The grain boundary resistivity and bulk resistivity exhibited different oxygen-partial-pressure-dependent behavior. Electron conduction is proposed as the primary mechanism for electrical conductivity in the bulk of the sintered body of SMM under both low and high oxygen partial pressures. Electron conduction and oxygen ion conduction were found to be the primary mechanisms for electrical conductivity at the grain boundary of SMM under low and high oxygen partial pressures, respectively.

収録刊行物

• Journal of the Ceramic Society of Japan

  Journal of the Ceramic Society of Japan 125 (6), 487-493, 2017

  公益社団法人 日本セラミックス協会

キーワード

• Solid oxide fuel cell
• Double perovskite
• Sr₂MgMoO_6−δ
• Anode material
• Electrical conductivity

詳細情報

• CRID: 1390282680262244096
• NII論文ID: 130006899938
• DOI: 10.2109/jcersj2.17025
• ISSN: 13486535
• ISSN: 18820743
• HANDLE: 10129/00006514
• Web Site: https://hirosaki.repo.nii.ac.jp/records/5443
• Web Site: https://www.jstage.jst.go.jp/article/jcersj2/125/6/125_17025/_pdf
• 本文言語コード: en
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