文摘
In this study, a new type of the Mg0.4Zn0.6O/Ce0.8Sm0.2O2-δ (MZSDC) composite electrolyte was synthesized using a co-precipitation method. Large-sized engineering cells have been fabricated and tested to meet the demands of applications. X-ray diffraction scanning electron microscopy and X-ray photoelectron spectroscopy have been employed to characterize the microstructure and the morphology of the synthesized samples. MZSDC is a composite system. X-ray electron spectroscopy shows that Ce (3d) binding energy shifted from high to low and the ratio of Ce3+ decreased in comparison to pure CeO2, due to the doping effect. The doping and composite caused the material to have an excellent electrical property, 0.089?S?·?cm?, and device performance, with a maximum power of 16.4?W (648?mW?·?cm?) achieved at 600?°C for a larger-sized (6?cm?×-?cm?×-?mm) fuel cell. The open circuit voltage and power of the fuel cell only slightly degrades (less than 1?%) after continually tested for 100?h. This is the first report regarding the large size engineering cell performance for using this new composite electrolyte with both excellent performance and low cost.