Ni-YSZ cermet anodes prepared by citrate/nitrate combustion synthesis

摘要: Abstract The synthesis of Ni–YSZ cermets with tailored particle package, shape and microstructural characteristics is essential when preparing anodes for solid oxide fuel cells (SOFC). These materials are generally prepared by sintering subsequent reduction the mixture metal oxides. In order to obtain an adequate contact area between electrocatalyst (Ni) ionic conductor (YSZ), alternative route was used based on mixed gel combustion material synthesis, calcination partial achieved in one step. precursor a citrate/nitrate from nickel, zirconium yttrium nitrates citric acid vacuum evaporation solution. reaction this produces submicrometer crystalline NiO–YSZ composite. influence fuel/oxidant molar ratio rate end product investigated. period, phase composition, morphology agglomerate formation were studied detail. It shown that initial strongly influences powder mixtures thus obtained. morphological properties oxides after reveal size distribution voluminous intermediate (green body) differ ratio. Narrower pore has great material. If green body narrow, coarsening YSZ NiO grains, subsequently, Ni grains less pronounced.