Abstract
Cathode-supported tubular solid oxide fuel cells (CS-T-SOFCs) have been regarded as promising energy conversion devices; However, their commercialization was blocked by high manufacturing cost. We have been researching dip-coating and co-sintering techniques for fabricating CS-T-SOFCs in order to reduce the cost. In this paper, we improved the sintering process and found that the degree of co-sintering has significant effects on the microstructure of electrodes and the electrolyte. The co-sintering temperature is limited by the reaction between the (La0.8Sr0.2)0.95MnO3+δ (LSM95) cathode and the Zr0.89Sc0.1Ce0.01O2+δ (SSZ) electrolyte; However, by changing the co-firing temperature of the cathode-supported electrolyte tube, the relative density of electrolyte and the connection of anode particles to CS-T-SOFC could be improved. As a result, the maximum power density of a CS-T-SOFC reached 740, 635and 489 mW•cm-2 at 850, 800 and 750 oC, respectively, with hydrogen as fuel. The long-term stability of the improved CS-T-SOFC was also investigated.
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