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。
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.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2009年第10期1842-1847,共6页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金资助项目(No.50662005)
