PREPARING METHOD OF NI/YSZ CORE-SHELL COMPOSITE FOR SOFC

摘要

The present invention relates to a material used for an anode of a solid oxide fuel cell (SOFC) and, in particular, to a method for preparing a nickel/yttria-stabilized zirconia (Ni-YSZ) core-shell composite comprising the solid solution of metal for a fuel cell having a core-shell structure to improve stability at a high temperature, which uses an existing Ni-YSZ composite with excellent electroconductivity and mechanical strength and comprises the solid solution of a small amount of Co, Fe, and the like to improve the rate of carbon deposition. The method for preparing a Ni-YSZ core-shell composite comprising the solid solution of metal for a fuel cell comprises the steps of: synthesizing nanopowder of nickel comprising the solid solution of metal (Ni1-xMx) by using a hydrazine reduction method; giving cations to the surface of the nickel comprising the solid solution of metal by adding a cation surface active agent in the process of synthesizing the nickel comprising the solid solution of metal by using the hydrazine reduction method; dissolving the composite nanopowder of yttria-stabilized zirconia (YSZ) having anions; churning the positively charged nickel comprising the solid solution of metal and the negatively charged YSZ in the solvent of distilled water; producing Ni-YSZ powder having the nickel comprising the solid solution of metal at the core thereof and the YSZ at the shell thereof by drying the churned mixed solution; and sintering, at a high temperature, pellets made of the Ni-YSZ powder comprising the solid solution of metal.