XPS Studies on Rare Earth Oxide LSCO／YSZ Electrodes
摘要
The X-ray diffraction spectra and X-ray photoelectron spectroscopy were measured for Sr-doped La1-xSrx CoO3 materials with perovskite structure prepared by the solid-state reaction method. The influence of heat-treatment temperature on the average crystal size of La1-xSrx CoO3 was studied. The surface chemical states of La1-xSrxCoO3 cathodes with different Sr-doped content were discussed. The experimental results show that average crystal size of La1-xSrxCoO3 under the condition of heat-treatment in the range of 900～1200 ℃ is larger than that at other temperatures, which is of benefit to forming porous electrodes. When La is replaced by Sr gradually, the oxygen vacancy concentration increases. It is of benefit to enhancing the transport property of oxygen ion.