Advances in Solid Oxide Fuel Cells VI: Ceramic Engineering by Prabhakar Singh, Narottam P. Bansal

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 Daytona Beach, FL, January 24 to 29, 2010. This symposium supplied a world discussion board for scientists, engineers, and technologists to debate and alternate cutting-edge rules, info, and expertise on quite a few points of sturdy oxide gas cells. a complete of seventy five papers have been provided within the kind of oral and poster shows, together with ten invited lectures, indicating powerful curiosity within the scientifically and technologically vital box of good oxide gasoline cells.  Authors from 11 international locations (China, Denmark, Germany India, Italy,Japan, Russia, South Korea, Taiwan, UK and U.S.A.) participated. The audio system represented universities, industries, and govt learn laboratories.

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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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 [22]: (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.

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