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Oral presentation

Study of electron-oxide ion mixed conduction in SOFC cathode materials by MEM

Ito, Takanori*; Yokote, Takenori*; Kitamura, Naoto*; Idemoto, Yasushi*; Sakuma, Takashi*; Takahashi, Haruyuki*; Igawa, Naoki

no journal, ,

The investigation and development of the cathode materials are one of the major subjects to decrease the operation temperature for solid oxide fuel cell. In this study, we measured the neutron and synchrotron X-ray diffraction of La $_{0.73}$ Sr $_{0.24}$ MnO $_{3}$ and (Ba $_{0.5}$ Sr $_{0.5}$ )(Co $_{0.8}$ Fe $_{0.2}$ )O $_{3-delta}$ . We discuss the mechanism of the electron-oxide ion mixed conduction from the Rietveld and the maximum entropy method analyses.

Oral presentation

Crystal structure of SOFC cathode materials by neutron and synchrotron X-ray diffraction

Ito, Takanori*; Yokote, Takenori*; Kitamura, Naoto*; Idemoto, Yasushi*; Sakuma, Takashi*; Takahashi, Haruyuki*; Igawa, Naoki

no journal, ,

Perovskite-type oxides with electron-oxide ion mixed conduction are attractive materials as a cathode for solid oxide fuel cell. Although (La,Sr)MnO $_{3}$ is applied for this purpose, (Ba,Sr)(Co,Fe)O $_{3-delta}$ has much attention because it has lower operation temperature. In this study, we carried out the neutron and synchrotron X-ray diffraction study on those materials, and discuss the difference in crystal structure including the nuclei and electron distribution on the transition metal-oxygen plain in the crystal from the results of the Rietveld and the maximum entropy method analyses.