Ni-YSZ Anode of IT-Solid Oxide Fuel Cell Prepared by Impregnation

Using YSZ powder and graphite pore former as the raw materials for preparing an anode support body, which were laminated with the YSZ thin layer, the porous YSZ anode support body skeleton/electrolyte layer composite matrix after co-firing was obtained. The quantitative relationship between the graphite content and the porosity was studied. When the graphite content in the anode support body is 70wt%, the porosity of the skeleton is up to 50vol%. Using 2 mol/L aqueous solution of nickel nitrate and citric acid-nickel (1:1) complex solution as the impregnating solution, respectively, to impregnate the composite matrix, the porous anodes with nickel (oxidation) as the catalyst. The relationship between the molar ratio R of the amount of citric acid and nickel ions and the nickel oxide particle sizes is as following were prepared after drying and calcination: the grain sizes of the nickel oxide particle in the anode exhibit a decreasing trend With the R value increasing, and the grain sizes are between the range of 7 similar to 30 nm. The polarization resistance of the anode prepared by impregnating in the citric acid-nickel complex compound is smaller than that of the anode impregnated in the nickel nitrate, about 1 order of magnitude, and the output power density of the cell prepared by this anode is also higher than that of nickel nitrate impregnated anode.