Preparation And Performances Of Cone-shaped Anode-supported Solid Oxide Fuel Cell Via Phase Inversion

In this paper, cone-shaped anode substrates were prepared by phase-inversion method and single cell and cell stack were prepared after sintering. The electrochemical analysis shows that: Single cell open circuit voltage (OCV) reach 1.0 V at 700 oC and its maximum power density was 410 m W / cm2 at 800 oC; two cells in series OCV reach 1.85 V at 650 oC and its maximum power was 1.45 W at 800 oC; three cells in series OCV reach 2.65 V at 600 oC and its maximum power was 1.52 W at 800 oC.Impedance spectra analysis showed that: in single cell, most of the total resistance is interface resistance and optimization of electrolyte and electrode contact is the next target; in the power reactor, the next targets are optimization of connection between the batteries and to improve the performance of single-cell identity.SEM analysis showed that both anode and cathode owned porous structure which met the requirements as electrode and they contacted well with electrolyte and a clear interface was found between them.In the paper, anode substrates sintering process was researched and a suitable sintering process was given. Affect of different pore former on the anode microstructure was compared and to add 10 % graphite in the anode was a good choice.As a technology to prepare cone-shaped anode-supported SOFC, the phase-inversion method has a bright future. The process is simple and greens have high strength. Stack was assembled easily because it is a nearly size molding process. Anode has a porous structure, which helps oxidation of the fuel gas. And ohmic resistances of single cell and stack are small. But to achieve commercial application, there is still a long way to go. The thickness of anode and sintering deformation control are two problems to be resolved at present.