Analyses of proton behavior in solid oxide fuel cells using neutron diffraction

• Project/Area Number: 24560866
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Structural/Functional materials
• Research Institution: Japan Atomic Energy Agency
• Principal Investigator: IGAWA Naoki 独立行政法人日本原子力研究開発機構, 原子力科学研究部門 量子ビーム応用研究センター, 研究主幹 (60354833)
• Co-Investigator(Kenkyū-buntansha): KODAMA Katsuaki 独立行政法人日本原子力研究開発機構, 原子力科学研究部門 量子ビーム応用研究センター, 研究主幹 (10313115) ; TAGUCHI Tomitsugu 独立行政法人日本原子力研究開発機構, 原子力科学研究部門 量子ビーム応用研究センター, 研究主幹 (50354832)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000); Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2012: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
• Keywords: 燃料電池 / 中性子散乱 / 水素 / プロトン伝導体 / リートベルト解析 / MEM解析

Outline of Final Research Achievements

For the improvement of functional performance of solid oxide fuel cells, we analyzed the proton behavior and atomic-disorder in the crystal structure by the combination of neutron diffraction, Rietveld/ maximum entropy method and the atomic pair distribution function (PDF) method.
We determined 3-dimensional nuclear density distribution of La-Ce oxide compound. We found the oxygen atom-disorder in the material using neutron PDF method. The low hydrogen density distribution was found and the diffuse pathway of hydrogen was determined in Ba-Sn-In oxide compound. We also found the local structural disorder caused by hydrogen.

Research Products

• [Journal Article] Weak Ferromagnetic Ordering Disordered by Rh3+ Ions for LaCo0.8Rh0.2O3 (2014)
  • Author(s): Shinichiro Asai, Ryuji Okazaki, Ichiro Terasaki, Yukio Yasui, Naoki Igawa, and Kazuhisa Kakurai
  • Journal Title: JPS Conference Proceedings Volume: 3 Pages: 014034-014034
  • DOI: 10.7566/jpscp.3.014034
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Local Structural Analysis by using Atomic Pair Distribution Function on Mixed Valence Compound (2014)
  • Author(s): K. Kodama, N. Igawa, S. Shamoto, K. Ikeda, H. Oshita, N. Kaneko, T. Otomo, K. Suzuya,
  • Journal Title: JPS Conference Proceedings Volume: 3 Pages: 013012-013012
  • DOI: 10.7566/jpscp.3.013012
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Protonic Conduction, Crystal and Electronic Structures of La1-xBa1+xGa1-yMgyO4-δ (2013)
  • Author(s): N. Hamao, N. Kitamura, T. Itoh, N. Igawa, Y. Idemoto
  • Journal Title: Solid State Ionics Volume: 253 Pages: 123-129
  • DOI: 10.1016/j.ssi.2013.09.021
  • Peer Reviewed
• [Journal Article] Local Lattice Distortion Caused by Short Range Charge Orderng in LiMn2O4 (2013)
  • Author(s): K. Kodama, N. Igawa, S. Shamoto, K. Ikeda, H. Ohshita, N. Kaneko, T. Otomo, and K. Suzuya
  • Journal Title: Journal of the Physical Society of Japan Volume: 82 Issue: 9 Pages: 094601-094601
  • DOI: 10.7566/jpsj.82.094601
  • Peer Reviewed
• [Journal Article] 155Gd Mossbauer Spectroscopic and Powder X-ray Diffraction Study of CeO2-GdO1.5 Solid Solution (2012)
  • Author(s): A. Nakamura, K. Imai, N. Igawa, Y. Okamoto, E. Yamamoto, S. Matsukawa, M. Takahashi
  • Journal Title: Hyperfine Interactions Volume: 207 Issue: 1-3 Pages: 67-71
  • DOI: 10.1007/s10751-011-0419-0
  • Peer Reviewed
• [Journal Article] Electrochemical Characteristics of Layered Li_<1.95> Mn_<0.9> Co_<0.15> O_3(C2/m) as a Lithium-Battery Cathode (2012)
  • Author(s): K. Ozawa, Y. Nakao. T. Mochiku, Z. Cheng, L. Wang, H. Iwai, Y. Tsuchiya, H. Fujii, N. Igawa
  • Journal Title: Journal of the Electrochemimcal Society Volume: 159 Issue: 3 Pages: A300-A304
  • DOI: 10.1149/2.079203jes
  • Peer Reviewed
• [Presentation] Crystal Structure and Electron Density Distribution Analyses of NdxCe1-xO2-δ for Electrolyte by Rietveld/ Maximum Entropy Method (2014)
  • Author(s): T. Taguchi, N. Igawa, S. Miwa, A. Birumachi, H. Asaoka, M. Osaka
  • Organizer: 7th International Symposium on Surface Science
  • Place of Presentation: Matsue, Japan
  • Year and Date: 2014-11-02 – 2014-11-06
• [Presentation] Nuclear and Electron Density Distributions of LiMn2O4 Analyzed by Combination of Rietveld/ Maximum Entropy Method (2014)
  • Author(s): N. Igawa, K. Kodama, A. Birumachi, T. Taguchi
  • Organizer: 7th International Symposium on Surface Science
  • Place of Presentation: Matsue, Japan
  • Year and Date: 2014-11-02 – 2014-11-06
• [Presentation] Local Lattice Distortion Caused by Short-range Charge Ordering in Transition Metal Oxides (2014)
  • Author(s): K. Kodama, N. Igawa, S. Shamoto, K. Ikeda, H. Ohshita, N. Kaneko, T. Otomo, K. Suzuya, A. Hoshikawa, T. Ishigaki
  • Organizer: 2nd International Symposium on Science at J-PARC
  • Place of Presentation: Tsukuba, Japan
  • Year and Date: 2014-07-12 – 2014-07-15
• [Presentation] プロトン伝導性酸化物BaSn0.5In0.5O2.75の結晶構造の静的な乱れ(2) (2014)
  • Author(s): 長崎 正雅, 山田 智明, 吉野 正人, 井川 直樹
  • Organizer: 第52回セラミックス基礎科学討論会
  • Place of Presentation: ウインクあいち（愛知県）
• [Presentation] スピネル化合物LiMn2O4における電荷の短距離秩序による局所構造歪み (2014)
  • Author(s): 樹神 克明, 井川 直樹, 社本 真一, 池田 一貴, 大下 英敏, 金子 直勝, 大友 季哉, 鈴谷 賢太郎, 星川 晃範, 石垣 徹
  • Organizer: 日本物理学会第69回年次大会
  • Place of Presentation: 東海大学湘南キャンパス（神奈川県）
• [Presentation] プロトン伝導性酸化物BaSn0.5In0.5O2.75 の結晶構造の静的な乱れ (2012)
  • Author(s): 早川 和孝, 長崎 正雅, 山田 智明, 吉野正人, 井川 直樹, 星川 晃範, 石垣 徹
  • Organizer: 日本セラミックス協会 第25回秋季シンポジウム
  • Place of Presentation: 名古屋大学東山キャンパス（愛知県）