The Study Of The Preparation Of The Co-firing Body Of Film YSZ-Porous YSZ And Medium Temperature SOFC Anode Via Impregnation

Solid oxide fuel cell (SOFC) is a kind of equipment ,stored in the chemical energy of the fuel directly translate into electrical energy,with high efficiency, the outstanding characteristic of friendly to environment, it is be called the 21st century green power generation technology. But so far, there are still many problems have not been solved properly,like the production and material of SOFC, and so on . Combining research status and the lab SOFC existing conditions, this paper mainly developed using different kind of porous agents to made of YSZ YSZ - porous membrane were burned, and the use of immersion method composite plate to preparation temperature SOFC anode half batteries.In this paper, YSZ films with YSZ and the YSZ pore-forming suppressed together were put forward , then YSZ film- high porosity YSZ co-firing body were prepared. The co-fired structure is litter flat, with the two tightly, the thin YSZ were dense YSZ electrolyte layer and the porous YSZ structure of uniform, fine with porosity as high as 68vol.%. The preparation of co-firing benefit to the preparation of anodes which used impregnation method . G3 (90% of the following 6μm) graphite and 5μm of PMMA can get a better film YSZ-porousYSZ co-firing through the study of different types of pore-forming (including different types of graphite, starch and PMMA), because the axis of the two pore were mostly vertical to the electrolyte layer and connected together, which can obtain high-performance single-cell.there exists an optimal content values of porous agent content changes and materials hrikage.though the study of the graphite. The optimal content changed when the particle size changed, when the pore-forming content is less than the optimal value, the shrinkage of materials reduced when the pore-forming increases ; When the pore-forming content is more than the optimal content value, materials with shrinkage increased when the pore-forming increases. For small particle size, the optimal content is bigger, For bigger particle size, the optimal content is small. The optimal graphite content is 35% and 50% respectively for preparation of porous YSZ material with G4 graphite (6 muon m below 60%) and G3 (6 muon m below 90%) graphite powder.The shortcomings of impregnation exist, like the Long period of impregnation, and so on. Usually, It needs 9-10 times dipping and firing repeated. In this paper, prepared by chemical impregnation to the anode, greatly reducing the soaking period, only 3 repeats of the dipping and firing can achieve the desired anode NiO content.Compared to the method of the direct mix introduction catalyst NiO to preparation anode material, The impregnation method has its advantage , the former cell electricity performance is higher than the latter cell obviously, because through soaks, on the anode skeleton exists massive nanometers crystal grains, not only may provides the great surface area for the gas adsorption and coming off, moreover can provide the more response activation spot. 700℃, H2 is the fuel, the air is the oxidant, the former's peak power output density reaches 0.83W/cm~2, but the latter's peak power output density is only 0.43 W/cm~2.