Origins of structural and electrochemical influence on Y-doped BaZrO 3 heat-treated with NiO additive

Donglin Han, Kozo Shinoda, Susumu Tsukimoto, Hisao Takeuchi, Chihiro Hiraiwa, Masatoshi Majima, Tetsuya Uda

研究成果: Article査読

45 被引用数 (Scopus)

抄録

Nickel (Ni) is expected to be an attractive anode material for protonic ceramic fuel cells using Y-doped BaZrO3 (BZY) as an electrolyte, since Ni shows good catalytic properties for the anode reaction, and NiO is a sintering aid for BZY. In this work, a systematic investigation has been performed to reveal the influence of Ni incorporation on structural and electrochemical properties of BZY. Then, some new knowledge was obtained; the important point is that Ni cations occupy the interstitial position of (1/2, 0, 0) in the lattice of BZY, with a greatly Ba-deficient environment. As a result, Ba cations were possibly driven to the grain boundary and induced the formation of a liquid phase, which promoted the sintering process. However, the occupation of Ni on this (1/2, 0, 0) position also resulted in a negative influence on conductivity. A careful processing is required to apply Ni as the electrode in BZY based fuel cells. This journal is

本文言語English
ページ(範囲)12552-12560
ページ数9
ジャーナルJournal of Materials Chemistry A
2
31
DOI
出版ステータスPublished - 2014 8 21

ASJC Scopus subject areas

  • 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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