采用流延-浸渍法制备Ni-YSZ阳极半电池,然后在阳极中分别浸渍CeO2和BaO对Ni-YSZ阳极表面进行修饰改性,最后以LSM-YSZ为阴极制备单电池,H2和乙醇为燃料进行电池的电性能测试,利用循环伏安法和交流阻抗法分别测试电池的I-V-P和EIS,采用SEM-EDS观察其微观结构.EDS结果表明电池阳极中CeO2和BaO的含量分别为5.03wt.%和2.2wt.%.以乙醇为燃料时,CeO2-Ni-YSZ阳极单电池在750 ℃时功率密度为0.22 W/cm2,电性能在7 h内基本稳定,没有发现明显衰减;BaO-Ni-YSZ阳极单电池在750 ℃时功率密度为0.11 W/cm2,电性能在9 h内衰减率为0.7%/h.实验结果表明:经CeO2和BaO的修饰改性,可以明显提高Ni-YSZ阳极的抗积碳性;浸渍CeO2可以明显提高单电池的电催化性能.%The Ni-YSZ anode half-cell was prepared by casting-impregnation method, and then the Ni-YSZ anode surface was modified by dipping CeO2and BaO respectively in the anode. Finally, a single cell was prepared with LSM-YSZ as cathode. H2and ethanol were used as fuel to test the electrical performance of the single cell. I-V-P and EIS of the single cell were tested by cyclic voltammetry and AC impedance respectively. The microstructure of the single cell was observed by SEM-EDS. The results of EDS show that the contents of CeO2and BaO in the anode are 5.03wt.% and 2.2wt.% respectively. When ethanol was used as fuel, the power density of CeO2-Ni-YSZ anode single cell was 0.22 W/cm2at 750 ℃, and the electrical properties were stable within 7 h. No significant decay of the single cell performance was found. The power density of BaO-Ni-YSZ anode single cell was 0.11W/cm2at 750 ℃, and the decay rate of electrical properties was 0.7%/h within 9h. The experimental results showed that the carbon deposition resistance of Ni-YSZ anode can be obviously improved by the modification of CeO and BaO; The electro-catalysis performance of single cell can be obviously improved by dipping CeO2.
展开▼
