Magnesium-Fluorine Doped on Li[NixCo1-2xMnx]O2 Material by Carbonate Precipitation

초록

To lower operation temperature, many kinds of materials have been investigated for electrolyte of SOFC intensively. At operating temperature below 700℃, low-cost metal could be used as the components of fuel cell systems such as interconnects, gas manifolds and heat exchangers. Doped ceria has been reported one of the most promising electrolyte for intermediate temperature SOFC because their ionic conductivity is higher than Yttria stabilized zirconia(YSZ). Electronic conductivity of doped ceria usually depends on the concentration and kind of dopant. Among these ceria based electrolytes, Samaria doped ceria was reported to exhibit the highest conductivity at fixed doping levels. Its precursor can be synthesized by diverse methods like as solid-state reaction, co-precipitation, spray pyrolysis and so forth. Co-precipitation has advantage to control composition with ease and it is possible to produce in large quantities. And the electrolyte powder produced by co-precipitation has homogeneous morphology which affects sinterability and cell fabrication. In this study, we reported that the preparation of spherical Sm0.1Ce0.9O1.95 precursor and the electrochemical and physical properties for SDC(Samaria doped Ceria) powders.