Investigation of shrinkage behavior of Ni–Fe bimetallic anode tube support and the densification of electrolyte using co-sintering temperature
► The OCV of the cells is linearly related to the tube diameter shrinkage degree, it reaches 1.1 V which basically equals to the Nernst voltage prepared at 1400 °C. ► At each co-sintering temperature from 1250 °C to 1400 °C, the porosity of NiO–Fe 2O 3/GDC anode tubes is nearly 10% higher than that...
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Veröffentlicht in: | Journal of power sources 2011-11, Vol.196 (22), p.9124-9129 |
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Sprache: | eng |
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Zusammenfassung: | ► The OCV of the cells is linearly related to the tube diameter shrinkage degree, it reaches 1.1
V which basically equals to the Nernst voltage prepared at 1400
°C. ► At each co-sintering temperature from 1250
°C to 1400
°C, the porosity of NiO–Fe
2O
3/GDC anode tubes is nearly 10% higher than that of NiO–Fe
2O
3/YSZ anode tubes. ► In one-step sintering of anode tubes (/GDC or/YSZ) and ScSZ electrolyte, their volumetric shrinkage, porosity, and power performance were studied systematically at different temperatures.
NiO–Fe
2O
3/gadolinium-doped CeO
2 (GDC), NiO–Fe
2O
3/yttria-stabilized ZrO
2 (YSZ) anode supported fuel cells were fabricated at co-sintering temperatures of anode-electrolyte from 1250
°C to 1400
°C. The volumetric shrinkage of the anode-electrolytes and the porosity of the anode tube were studied systematically at different temperatures. 1300
°C is the marginal temperature to obtain sufficient electrocatalytic activity of electrodes, and a higher temperature is needed to suppress gas leakage through the scandia-stabilized zirconia (ScSZ) electrolyte. At each co-sintering temperature from 1250
°C to 1400
°C, the porosity of NiO–Fe
2O
3/GDC anode tubes is nearly 10% higher than that of NiO–Fe
2O
3/YSZ anode tubes. SEM results exhibited the anode-supported electrolyte tends to be more dense as co-sintering temperature increasing to 1400
°C from 1250
°C. However, the high co-sintering temperature of 1400
°C will result in low porosity of anode which negatively affected the power density. |
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ISSN: | 0378-7753 1873-2755 |
DOI: | 10.1016/j.jpowsour.2011.05.039 |