Characteristics of YCoO3-type perovskite oxide and application as an SOFC cathode

Takaaki Sakai, Masako Ogushi, Kohei Hosoi, Atsushi Inoishi, Hidehisa Hagiwara, Shintaro Ida, Masatsugu Oishi, Tatsumi Ishihara

研究成果: Contribution to journalArticle査読

抄録

YCoO3is discussed as a novel cathode material for solid oxide fuel cells (SOFCs). One of the major issues for SOFC development is the side reactions that occur at the electrode and electrolyte interfaces. Characteristics such as the phase stability, reactivity against YSZ, electrical conductivity, and thermal expansion coefficients (TECs) of YCoO3were investigated. YCoO3was produced by the sol-gel method below 975 °C, and the fewest impurities were observed at a Y molar ratio of 0.96 (YCO-096). YCO-096 did not react significantly with the YSZ electrolyte when fired at 975 °C for 1 h. The main charge carrier of YCO-096 was confirmed to be electron-holes, h+, and the maximum conductivity was estimated to be 700 S cm−1at 900 °C. The TECs of YCO-096 were in the range of 16.5-44.2 × 10−6°C−1from room temperature to 900 °C. The YCO-096 cathode was stable in the YSZ electrolyte SOFC. Oxygen defects formed at the surfaces of particle YCO-096 were considered to significantly improve the cathodic performance.

本文言語英語
ページ(範囲)3584-3588
ページ数5
ジャーナルJournal of Materials Chemistry A
9
6
DOI
出版ステータス出版済み - 2 14 2021

All Science Journal Classification (ASJC) codes

  • 化学 (全般)
  • 再生可能エネルギー、持続可能性、環境
  • 材料科学(全般)

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