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

2014 Fiscal Year Final Research Report

• 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
• 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.

Free Research Field

材料工学