THE PROCESSING METHOD OF CO-SYNTHESIS NANOSIZED LSM-YSZ COMPOSITES WITH ENHANCED ELECTROCHANMICAL PROPERTY FOR SOLID OXIDE FUEL CELL, AND THE NANOSIZED LSM-YSZ COMPOSITES SYNTHESIZED BY THE ABOVE PROCESSING METHOD

摘要

A method for simultaneous preparation of nanosized LSM-YSZ mixture for a solid oxide fuel cell is provided to improve the quality of a cathode by virtue of well dispersion of nanoparticles, to facilitate gas diffusion through the porous structure of the particles, and to improve the cost efficiency. A method for simultaneous preparation of nanosized LSM-YSZ mixture for a solid oxide fuel cell comprises the steps of: determining stoichiometric amount of La(NO3)3.6H2O, Sr(NO3)2, Mn(NO3)2.4H2O, Y(NO3)3.6H2O and Zr(NO3)2.5H2O so as to satisfy the formula of [0.765La(NO3)36H2O + 0.135Sr(NO3)2 + 1 Mn(NO3)24H2O + 2.3767C2H5NO2 - (La0.85Sr0.15)0.9MnO3 + 4.753CO2 + 14.532H2O + 3.471N2; and 0.92ZrO(NO3)36H2O + 0.16Y(NO3)36H2O + 0.089C2H5NO2 -(ZrO2)0.92(Y2O3)0.08 + 0.178CO2 + 6.702H2O + 1.204N2], and dissolving the materials into distilled water to provide a parent solution; dissolving glycine into the parent solution in a stoichiometric amount determined to satisfy the above formula; heating the glycine-containing parent solution to produce a powder mixture by self-ignition; and calcining the mixture at 650-1200 deg.C.