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Fabrication Technology of Micro SOFCs and Modules
Keywords: micro SOFC, tubular cell, Fabrication
gAdvanced Ceramic Reactorh project supported by NEDO, Japan, aims to develop new fabrication technology for micro cells and their modules to realize a small, high performance electrochemical system such as a solid oxide fuel cell (SOFC) system, operable at quick start-up condition below 650 oC. SOFCs are known as high energy efficiency energy sources with high fuel flexibility. On the other hand, application was limited due to the use of ceramic components and high operating temperature >800 oC. To increase the variety of application use for SOFCs, the project was initiated to develop cost effective fabrication technology for micro SOFCs and modules, aiming for realizing APUs for automobile and power sources for domestic use by utilizing the advantages of micro SOFCs; high robustness under heat cycles and high volumetric power density. In this paper, tubular cell and module fabrication technology will be mainly discussed. So far, we developed a fabrication technology of high performance micro tubular SOFCs (0.4-2 mm diam.) using ceria based electrolyte and zirconia based electrolyte, which performed over 1 W/cm2 below 600oC. Cube shaped bundles and stacks have also been successfully developed to realize over 2 W/cc. Influences of stack design on the SOFC performance were also discussed for the optimization of the module design.
Toshio Suzuki, Research Scientist
National Institute of Advanced Industrial Science and Technology
Nagoya, Aichi 463-8560,
Japan


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