| 天然气中温SOFC阳极材料铒掺杂的氧化铈的制备与性能研究 |
| Preparation and Properties of Erbium-Doped Ceria (EDC) for IT-SOFC Anodes in Natural Gas |
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| 摘要: 采用溶胶-凝胶法合成了新型中温固体氧化物燃料电池(IT-SOFC)阳极材料Ce1-xErxOy(x=0.00，0.10，0.15，0.20，0.25，0.30)(EDC)，并采用共压-共烧结法制备了以NiO-EDC复合阳极为支撑、以Ce0.8Gd0.2O2-δ(GDC)为电解质、以La0.8Sr0.2Co0.8Fe0.2O3-δ(LSCF)-GDC为复合阴极的单电池。利用XRD和SEM等方法对阳极材料EDC进行了晶相结构、微观形貌和化学相容性等分析。在400~700 ℃范围内，以加湿天然气(3% H2O)为燃料气，氧气为氧化气测试了电池的电化学性能。结果表明：EDC阳极材料具有良好的孔道结构；11种不同阳极组成的单电池中50%(质量分数)NiO-50%(质量分数)Ce0.85Er0.15Oy(E15C85)阳极支撑的单电池具有最佳的电化学性能，在650 ℃时其最大电流密度为117.84 mA·cm-2和最大比功率为24.37 mW·cm-2。 |
| 关键词: 中温固体氧化物燃料电池 稀土氧化物 铒掺杂的氧化铈 电导率 |
| 基金项目: |
| Abstract: The article carried out the Sol-Gel Method to synthesize Ce1-xErxOy(x=0.00, 0.10, 0.15, 0.20, 0.25, 0.30) (EDC) powders, as the anode materials of intermediate temperature solid oxide fuel cell (IT-SOFC). The NiO-EDC anode-supported cells were fabricated by dry-pressing process using Ce0.8Gd0.2O2-δ (GDC) as electrolyte and La0.8Sr0.2Co0.8Fe0.2O3-δ(LSCF)-Ce0.8Gd0.2O2-δ(GDC) as cathode. The crystal forms, microstructures and chemical stability were investigated by XRD and SEM. The performances of single cells were tested by using humidified natural gas(3% H2O) as fuel and oxygen as oxidant in the temperature range from 400 ℃ to 700 ℃. The results show that the anode of the cell represents good open-framework; The 50% NiO-50% Ce0.85Er0.15Oy(E15C85) anode-supported cell demonstrates the best electrochemical performance among the eleven cells composed of different anodes. The maximum current density and power density are 117.84 mA·cm-2 and 24.37 mW·cm-2 tested at 650 ℃ respectively. |
| Keywords: IT-SOFC rare metal erbium-doped ceria electrical conductivity |
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| 郝红霞,刘瑞泉.天然气中温SOFC阳极材料铒掺杂的氧化铈的制备与性能研究[J].无机化学学报,2009,25(10):1842-1847. |
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