CuNi-GDC双金属阳极支撑的IT-SOFC制备及性能

采用柠檬酸低温自蔓延燃烧法制备了具有纳米尺度的Cu0.5Ni0.5O-GDC阳极粉末,利用差热分析、XRD对其物相进行了分析。研究了CuNi-GDC阳极片在氢气中还原前后的孔隙率和微观组织,对其电导率进行测试,并研究了CuNi-GDC阳极支撑的电池性能。结果表明:通过柠檬酸低温自蔓延燃烧法可以在较低的温度下合成出高催化活性的纳米粉末,CuNi-GDC阳极片还原后孔隙率达到了31.08%;CuNiO-GDC阳极片在空气中的电导率较低,导电活化能为39.494 4 kJ/mol,在H2气氛中的电导率大大提高,导电活化能为3.690 6 kJ/mol,650℃的电导率达到了209.299S/cm。以CuNiO-GDC双金属阳极支撑的单电池在650℃电池的开路电压为0.7 V,最大输出功率为0.278 W/cm2,短路电流密度为1.452 A/cm2。

Synthesis and properties research of CuNi-GDC double metal anode supported for IT-SOFC

Cu0.5Ni0.5O-GDC anode powders with nanoscale were prepared by nitrate-citric acid method.Anode powders were investigated by DSC-TG and XRD.The microstructure and properties of the CuNi-GDC anode material before and after reduction were investigated and the performance of the battery was also tested.The results show that nano-powders with high catalytic activity can be synthesized by the nitrate-citric acid method at a lower temperature;the porosity of CuNi-GDC anode was 31.08% after reduction.The electric conductivity of the Cu0.5Ni0.5O-GDC anode is low in the air,but in the H2 atmosphere,the conductivity is greatly improved and the conductive activation energy is 39.494 4 kJ/mol and 3.690 6 kJ/mol respectively.The electrical conductivity reaches 209.299 S/cm at 650 ℃.The open circuit voltage(OCV) for the cell of CuNi-GDC double metal anode supported is about 0.7 V,the maximum power density of 0.278 W/cm2 and a short circuit density of 1.452 A/cm2 of the cell are observed at 650 ℃.