Fabrication and Characterization of nano-structured CeO_2 thin film electrolytes for low temperature operation of SOFC

2008 Fiscal Year Final Research Report

• Project/Area Number: 19310062
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Environmental technology/Environmental materials
• Research Institution: National Institute for Materials Science
• Principal Investigator: MORI Toshiyuki National Institute for Materials Science, 燃料電池材料センター, 副センター長 (80343854)
• Co-Investigator(Kenkyū-buntansha): YE Fei 独立行政法人物質・材料研究機構, 燃料電池材料センター, 研究員 (10450298) ; YAN Ming 独立行政法人物質・材料研究機構, 燃料電池材料センター, NIMSポスドク研究員 (70465970)
• Project Period (FY): 2007 – 2008
• Keywords: 薄膜 / 低温稼働 / 燃料電池 / 界面構造 / エコマテリアル

Research Abstract

300-500℃の温度範囲において、高い酸化物イオン伝導度を持つ薄膜セリア系固体電解質材料開発手法を確立することを目的とし、薄膜セリア系固体電解質中のナノ構造の特徴が、伝導特性に与える影響を精査した。電極/固体電解質界面近傍には、アノードからのNiの拡散層が観察され、その領域内には、バルク固体中には認められなかったほどの、多量な酸素欠陥が秩序化した状態が観察され、あわせて多量のCe^<3+>の発生が確認された。この秩序化した酸素欠陥層を制御することが重要であることを明らかにした。

Research Products

• [Journal Article] Microstructural characteristics of samarium-doped ceria (SDC) electrolyte film supported by Ni-SDC cermet anode (2009)
  • Author(s): Ou D R, Mori T, Ye F, Miyayama M, Nakayama S, Zou J, Auchterlonie G, and Drennan J
  • Journal Title: Journal of The Electrochemical Society Vol.156(7) Pages: B825-B830
• [Journal Article] TEM and XPS analysis of CaxCe1-xO2-y(x = 0.05 - 0.5) as electrolyte materials for solid oxide fuel cells (2009)
  • Author(s): Yan M, Mori T, Zou J, Ye F, Ou D R, and Drennan J
  • Journal Title: Acta Materialia 57 Pages: 722-731
• [Journal Article] Compositional and valence state in inhomogeneities in Ce1-xTbxO2-δ(0.1< x <0.70) (2009)
  • Author(s): Ye F, Mori T, Ou D R, Zou J, and Drennan J
  • Journal Title: Transactions of the Materials Research Society of Japan 33 Pages: 1073-1076
  • Peer Reviewed
• [Journal Article] Effects of dopant concentration and calcination temperature on the microstructure of Ca-doped ceria nanopowders (2008)
  • Author(s): Yan M, Mori T, Ye F, Ou D R, Zou J, and Drennan J
  • Journal Title: ournal of the European Ceramic Society 28 Pages: 2709-2716
  • Peer Reviewed
• [Journal Article] Conducting properties of M0.25Ce0.75O1.875(M=Dy, Gd) sintered specimen fabricated by the combined process of pulsed electric current sintering and fast sintering (2008)
  • Author(s): Suga H, Mori T, Ye F, Ou D R, Nishimura T, Drennan J, and Kobayashi H
  • Journal Title: Transactions of the Materials Research Society of Japan 33 Pages: 1085-1088
  • Peer Reviewed
• [Journal Article] Growth of Nano-sized Domains during Sintering Process and their Effect on the Ionic Conductivity of Ytterbium-Doped Ceria (2008)
  • Author(s): Ye F, Mori T, Ou D R, Zou J, and Drennan J
  • Journal Title: Proceedings of the 10th International Conference of the European Ceramic Society Pages: 723-727
• [Journal Article] Influence of nano-structural feature of M0.25Ce0.75O1.875 (M=Gd, Yb, Y) solid electrolytes on their electronic properties (2007)
  • Author(s): Mori T, Buchanan R, Ou D R, Ye F, Suga H, and Drennan J
  • Journal Title: Transactions of the Materials Research Society of Japan Vol.32 Pages: 943-946
  • Peer Reviewed
• [Journal Article] Sintering behavior of M0.25Ce0.75O1.875 (M=Dy, Gd) ceramics fabricated using pulsed electric current sintering method (2007)
  • Author(s): Suga H, Mori T, Ye F, Ou D R, Buchanan R, Nishimura T, Drennan J, and Kobayashi H
  • Journal Title: Transactions of the Materials Research Society of Japan Vol.32 Pages: 947-950
  • Peer Reviewed
• [Journal Article] Design of micro-structure at atom level in Dy doped CeO2 solid electrolytes for fuel cell applications (2007)
  • Author(s): Mori T, Drennan J, Ou D R, and Ye F
  • Journal Title: Materials Science Forum 539-543 Pages: 1437-1442
  • Peer Reviewed
• [Journal Article] Investigation of the effect of microstructure on the conductivity of Sm2O3- and Y2O3- doped BaCeO3 in various atmospheres (2007)
  • Author(s): Buchanan R, Mori T, and Ye F
  • Journal Title: Transactions of the Materials Research Society of Japan Vol.32 Pages: 959-962
  • Peer Reviewed
• [Presentation] Effect of Ni Diffusion on the Microstructure of Gadolinium-Doped Ceria (GDC) Electrolyte Film Supported by Ni-GDC Cermet Anode (2008)
  • Author(s): Ye F, Mori T, Ou D R, Miyayama M, Nakayama S, Zou J, Drennan J
  • Organizer: The IUMRS Intern ational Conference in Asia, 2008 (IUMRS-ICA 2008)
  • Place of Presentation: 名古屋国際会議場, 名古屋
  • Year and Date: 20081209-13
• [Presentation] 燃料電池の現状と将来 (2008)
  • Author(s): 森利之
  • Organizer: 第19回溶接技術講演会
  • Place of Presentation: 中央電気クラブ215号室, 大阪(招待講演)
  • Year and Date: 2008-12-04
• [Presentation] Grain growth behavior and conductivity property of Ca doped CeO2 (2007)
  • Author(s): Yan M, Mori T, Ye F, Ou D R, Zou J, Drennan J
  • Organizer: The 24th Japan-Korea International Seminar on Ceramics
  • Place of Presentation: Shizuoka Institute of Science and Technology, Japan
  • Year and Date: 20071120-22
• [Presentation] Design of nano-structured doped ceria solid electrolytes for fuel cell application (2007)
  • Author(s): Mori T(Invited), Ou D R, Ye F, Yan M, Zou J, and Drennan J
  • Organizer: Advanced in Functional Nanomaterials 2007
  • Place of Presentation: Holiday Inn surfers Paradise, Gold Coast, Brisbane, Australia
  • Year and Date: 20071111-13
• [Remarks] the American Institute of Physics と the American Physical Societyが共同で運営しているVirtual Journal of Nanoscale Science & TechnologyのMay issueに主要発表論文番号1、"Microstructural Characteristics of SDC Electrolyte Film Supported by Ni--SDC Cermet Anode"が、注目論文として再掲載されました。American Institute of Physics と American Physical Societyから、注目研究として、選定されたことは、本研究の内容が、国際的にも、高い評価受けているといえます。
  • URL: http://www.vjnano.org