By Prabhakar Singh, Narottam P. Bansal
The 7th overseas Symposium on reliable Oxide gasoline Cells (SOFC): fabrics, technological know-how, and know-how was once held through the 34th overseas convention and Exposition on complicated Ceramics and Composites in
those court cases include contributions on a number of facets of reliable oxide gas cells that have been mentioned on the symposium. Fifteen papers describing the present prestige of sturdy oxide gasoline cells know-how are incorporated during this volume.Content:
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Additional info for Advances in Solid Oxide Fuel Cells VI: Ceramic Engineering and Science Proceedings, Volume 31
28 ■ Advances in Solid Oxide Fuel Cells VI Durability Improvement of Segmented-in-Series Cell Stacks for Small Scale SOFCs Durability of cells-stacks improved cathode Durability of the cells-stacks modified to inhibit the increase of gas leakage was improved. Furthermore, the cells-stacks modified were improved about cathode. 24A/cm2, an average temperature of 775 °C having small temperature distribution less than 30 °C, and fuel utilization of 70%. A thin line plotted in Fig. 7 indicates the voltage of the cellsstacks unimproved cathode in the case of the "standard" condition shown above in Fig.
The samples made from SSR method have lower conductivity than that of the samples made from GNC, probably due to impurity phases in samples made from SSR. The conductivity increases with an increase in temperature and can be expressed in the Arrhenius equation : (2) 1η(σΤ) = InA - Ea/(RT) where A is the pre-exponential coefficient, Ea is the activation energy, R is the universal gas constant and T is the absolute temperature. The activation energy for the electrical conduction is calculated from the slope of the curve.
As expected, the percentage thermal expansion increases with temperature for all the samples. The slope for the LSCF-GDC samples also increases with increasing LSCF content. Among these, three samples the expansion is found to be lowest for the GDC electrolyte. The doped samples had closer thermal expansion properties to one another than pure LSCF and GDC samples. 5 x K r V C , respectively. It can be concluded that the thermal expansion coefficients increase with the increase of the LSCF content.