Alternative Tubular Cell Designs

Tubular cells, identical in design to that of Siemens Westinghouse cells, are also being developed by Toto Ltd of Japan they use a wet slurry dip/sintering method for depositing cell components on the cathode tube to reduce the manufacturing cost of the cells [30-34], However, the performance and performance stability with time of these cells still need improvement. 

I igure 8.22 Photograph of the segmented-m-series cell stack. (Courtesii of Mitsubishi Hcavg Industries.) 

I-inure S.23 Cross-seelions of tubular andflattened ribbed HPD cells I i l. 

---

Although cathode-supported tubular SOFCs in large-scale stacks are the type of SOFC stack most widely commercialized, recent alternative tubular cell designs have been developed with anode-supported designs for smaller-power applications. Cells in these stacks have diameters on the order of several millimeters rather than centimeters,... 

Various alternative cell designs are under development to avoid the difficulties mentioned above. For example, flattened ribbed cells have been conceived to obtain higher power densities than tubular cells yet require no seals. Another example is the seal-less planar design which is being developed to ease the sealing issues of planar cell stacks. 

---