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Development of tubular electrochemical cell for SOFC/SOEC applications
Keywords: solid oxide fuel cell, solid oxide electrolysis cell, fabrication process
Solid oxide fuel cells (SOFCs) have received a great deal of attention recently, due to in part to their high energy conversion efficiency and environmental compatibility. Recently, an electrochemical cell with the same components as SOFCs has also been developed as a solid oxide electrolysis cell (SOEC). The use of alternative high performance electrolytes and electrodes materials means that the SOFC/SOEC operation temperature can be reduced. In addition, miniaturization of the cell size and integration of multiple miniaturized cells is also considered to be one of the most effective approaches to increase the volumetric power density. Micro SOFC/SOEC designs exhibit many desirable characteristics, such as increasing the net electrode area per unit volume and the durability to thermal stress caused by rapid start-up operation. Very recently, various researchers reported the excellent electrochemical performances and durability of heat-cycles for micro SOFC/SOEC designs. Most of the cells are supported by a porous fuel-electrode tube. Therefore the tubular fuel-electrode support works as a current collector and gas diffusion layer as well as support medium of SOFC/SOEC. Thus, the aim of this study is to realize the micro SOFC development with a reliable electrolyte layer on the excellent gas permeation, conductivity and mechanical strength. In this presentation, we will report low temperature preparation technologies of the electrolyte film on the tubular anode support in order to improve the anode polarization resistances.
Toshiaki Yamaguchi,
National Institute of Advanced Industrial Science and Technology
Nagoya, Aichi
Japan


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