期刊
MATERIALS TRANSACTIONS
卷 62, 期 12, 页码 1732-1738出版社
JAPAN INST METALS & MATERIALS
DOI: 10.2320/matertrans.MT-M2021125
关键词
strontia-doped ceria; nickel; yttria-stabilized zirconia; cermet; anode; solid oxide fuel cell; methane
资金
- JSPS KAKENHI [18H01746]
- Pacific Rim Green Innovation Hub Project (Nagaoka University of Technology (NUT) )
- MEXT
- Grants-in-Aid for Scientific Research [18H01746] Funding Source: KAKEN
The performance of Ni/SrO-doped CeO2 (SrDC) anode-supported cells, combined with Sm2O3-doped CeO2 (SDC) electrolyte layer, for direct supply of methane has been investigated. The 5 mol% SrO-doped CeO2 cell shows the highest performance without time-dependent degradation even at 750 degrees C, providing better performance with decreasing operating temperature than conventional Ni/YSZ anode-supported cells. The enhancement effect is attributed to the mixed ionic-electronic conduction of CeO2-based solid electrolytes.
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 thy CH4. The SrO content in the Ce1-xSrxO2-x solid solution affects the porous structure of the starting anode support comprising of the sintered NiO and Ce1-xSrxO2-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 degrees 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 degrees C. This enhancement effect is discussed in light of the mixed ionic-electronic conduction of the CeO2-based solid electrolytes.
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