NiO／Ce0.8Sm0.2O1.9阳极材料制备及单电池性能

Preparation and Characterization of NiO/Ce_(0.8)Sm_(0.2)O_(1.9) Anode Material and Single Cell

本文采用柠檬酸燃烧法制备了柠檬酸与金属离子摩尔比(MRCM)为1.5的NiO/Ce0.8Sm0.2O1.9(NiO/SDC)粉体,对其相组成和形貌等进行了表征。以NiO/SDC为阳极原料,共压法制备了SOFC单电池,对其电化学性能性能进行测试。结果表明,用柠檬酸燃烧法成功制备出NiO/Ce0.8Sm0.2O1.9(NiO/SDC)粉体,NiO/SDC粉体中NiO与SDC晶体的粒度分别为10.39nm和7.01nm,粉体的分散性好,比表面积大。所制备的单电池在800℃测试温度下开路电压为0.721V,最大输出功率密度可达224.2mW/cm2。本试验的初步实验结果表明,以柠檬酸燃烧法制备的NiO/Ce0.8Sm0.2O1.9(NiO/SDC)粉体为原料制备的阳极材料所构建的SOFC单电池表现出较好的电池性能,为阳极材料的研究开拓了新的发展方向。

NiO/Ce0.8Sm0.2O1.9 （NiO/SDC） composite powder was prepared by a citric acid-nitrate combustion method in which the molar ratio of citric acid to metal ion （MRCM） was set 1.5. The phase composition and particle size of the powder were determined by X-ray diffraction and transmission electron microscope. Solid oxide fuel monocell with the NiO/SDC as anode was fixed up and tested on a home-made fuel cell testing device to investigate its electrochemical performance. The powder was well dispered and with high specific area. The respectively. The average particle sizes of NiO and SDC in the powder single cell can achieve the highest power density of were found 10.39nm and 7.01nm, 224.2mW/cm2 and an open circuit voltages of 0. 721V at 800℃. These results suggest that the SOFC monocell made with NiO/Ce0.8Sm0.2O1.9 （NiO/SDC） powder as the anode has a good cell performance, and the whole process may be a new direction for the study of anode materials.