Influence of initial powder morphology on polarization characteristics of nickel/Gadolinium-doped-ceria solid oxide fuel cells electrode

Anna Sciazko, Kazuki Miyahara, Yosuke Komatsu, Takaaki Shimura, Zhenjun Jiao, Naoki Shikazono

研究成果: Article査読

20 被引用数 (Scopus)

抄録

Nickel-gadolinium doped ceria (Ni-GDC) composite anodes gain a lot of attention as they have potential to be a beneficial solution for the intermediate temperature solid oxide fuel cells. In this paper, the influence of the initial microstructure of Ni-GDC anode on the polarization characteristics and its deterioration in 100h operation are investigated. The initial microstructures of the investigated anodes are determined by the different sizes and aspect ratios of the GDC powders, but all anodes having the same initial compositions of NiO:GDC = 60:40 vol.%. It was found that the anode with the smallest GDC particle had the best initial performance, but also underwent the most severe degradation. Themicrostructures of the fabricated anodeswere investigated by focused ion beam - scanning electron microscopy (FIB-SEM), andmicrostructural parameters were quantified to relate the electrochemical performance. From the experimentation, contribution of the Ni-GDC microstructure to the anode polarization characteristics is discussed. Themorphological evolution after the operation is also in discussion, especially those of the GDC phase. It was concluded that the mobility of GDC could be an influential factor determining the change in polarization resistance.

本文言語English
ページ(範囲)F44-F52
ジャーナルJournal of the Electrochemical Society
166
2
DOI
出版ステータスPublished - 2019
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 再生可能エネルギー、持続可能性、環境
  • 表面、皮膜および薄膜
  • 電気化学
  • 材料化学

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