Active Role of SDC Interlayer in Multi-layer Anode of SOFCs

• WANG Xiaoge

  Department of Biological and Chemical Engineering, Gunma University

• NAKAGAWA Nobuyoshi

  Department of Biological and Chemical Engineering, Gunma University

• KATO Kunio

  Department of Biological and Chemical Engineering, Gunma University

抄録

To improve anode performance for a Solid Oxide Fuel Cell (SOFC) at medium temperature (923-1073 K), an interlayer of samaria doped ceria (SDC) is inserted between the Ni anode and the YSZ (Yttria Stabilized Zirconia) electrolyte by RF magnetron sputtering. Great reduction in anode overpotential with the interlayer is confirmed using both ac impedance and dc current interruption. The anodic interfacial conductivity, which is obtained from the complex impedance plot measured under equilibrium potential can be increased by two orders of magnitude by inserting a 2∼3 µm-thick SDC layer. This study proposes an appropriate model for the anodic reaction at this kind of multi-layer anode and discusses the mechanism for performance improvement due to insertion of the SDC interlayer. The results suggest that the SDC mixed conductivity helps to create more active reaction sites within a certain thickness in the SDC layer.

収録刊行物

• Electrochemistry

  Electrochemistry 70 (4), 252-257, 2002-04-05

  公益社団法人　電気化学会

キーワード

• SDC Interlayer
• Anode
• Sputtering
• SOFC

詳細情報

• CRID: 1390845702278257792
• NII論文ID: 10008009491
• NII書誌ID: AN00151637
• DOI: 10.5796/electrochemistry.70.252
• ISSN: 21862451
• ISSN: 13443542
• NDL書誌ID: 6128127
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6128127
• Web Site: https://www.jstage.jst.go.jp/article/electrochemistry/70/4/70_252/_pdf
• 本文言語コード: en
• データソース種別:
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  • NDL
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• 抄録ライセンスフラグ: 使用可