Preparation of La_0.45Ce_0.55O_2-δ anode interlayer film for IT-SOFC

La_0.45Ce_0.55O_2-δ(LDC45) as an interlayer between the Ni-LDC45 anode and La_0.9Sr_0.1 Ga_0.8Mg_0.2 O_2-δ(LSGM) electrolyte can prevent the solid-state reactions between Ni and LSGM. In this study, the LDC45 interlayer film is prepared by screen-printing, and the processes, such as the binder selection, the screen-printing of film, and the sintering, are researched in detail. The results showed that compact interlayers are obtained with CMC as the binder. During the screen-printing, a squeegee and the screen of 53μm are suitable for obtaining a thin and dense interlayer. The influence of firing temperature onthe micromorphology of LDC45 film is also investigated, it is found that the optimum temperature is 1400°C, A dense LDC45 interlayer film could effectively suppress the interface reaction between anode and electrolyte, catalyze the dissociative chemisorption of the fuel, and increase the maximum power density of cells by 72%.