SrO Doping Effect on Fabrication and Performance of Ni/Ce1−xSrxO2−x Anode-Supported Solid Oxide Fuel Cell for Direct Methane Utilization

Nicharee Wongsawatgul; Shinichi Momiyama; Soamwadee Chaianansutcharit; Kenichi Yoshida; Makoto Nanko; Kazunori Sato

doi:10.2320/matertrans.MT-M2021125

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SrO Doping Effect on Fabrication and Performance of Ni/Ce₁₋_xSr_xO₂₋_x Anode-Supported Solid Oxide Fuel Cell for Direct Methane Utilization

Nicharee Wongsawatgul, Shinichi Momiyama, Soamwadee Chaianansutcharit, Kenichi Yoshida, Makoto Nanko, Kazunori Sato

著者情報

キーワード: strontia-doped ceria, nickel, yttria-stabilized zirconia, cermet, anode, solid oxide fuel cell, methane

ジャーナルフリー早期公開

論文ID: MT-M2021125

DOI https://doi.org/10.2320/matertrans.MT-M2021125

この記事には本公開記事があります。

The final version of this article is now available: Vol. 62 (2021), No. 12 pp. 1732-1738

詳細

抄録

The performance of Ni/SrO-doped CeO₂ (SrDC) anode-supported cells, combined with the Sm₂O₃-doped CeO₂ (SDC) electrolyte layer, has been investigated for the direct supply of a dry CH₄. The SrO content in the Ce₁₋_xSr_xO₂₋_x solid solution affects the porous structure of the starting anode support comprising of the sintered NiO and Ce₁₋_xSr_xO₂₋_x grains and denseness of the SDC layer by co-sintering. The cell using the 5 mol% SrO-doped CeO₂ shows the highest cell performance without time-dependent degradation even at 750°C. This cell (the 5SrDC cell) also provides better cell performance with decreasing operating temperature than the conventional Ni/YSZ anode-supported cell (the YSZ cell); the maximum power density of the 5SrDC cell is higher than that of the YSZ cell by 73% at 650°C. This enhancement effect is discussed in light of the mixed ionic-electronic conduction of the CeO₂-based solid electrolytes.

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