(583ev) Fabrication and Operating Characteristics of Flat Tubular Segmented-in-Series(SIS) Solid Oxide Fuel Cells (SOFC) Unit Bundle

An unit bundle of a flat tubular segmented-in-series(SIS) SOFC for intermediate temperature (600 – 800 ^oC) operation was fabricated and operated in this study. For this purpose, we fabricated flat tubular ceramic supports through an extrusion process and analyzed the basic properties of the ceramic support, such as visible microstructure, porosity, and mechanical strength, gas permeability, respectively. After that, we manufactured a flat tubular SIS SOFC single cell by using screen printing and vacuum slurry dip-coating method in the case of electrode and electrolyte. In addition, to make an unit bundle for flat tubular SIS SOFC, 5 SIS SOFC single cells with an effective electrode area of 0.8 cm² were coated onto the surface of the prepared ceramic support and were connected in series by using Ag+glass interconnect between each single SIS SOFC cell. The performance of the 5-cell unit bundle for flat tubular SIS SOFC in 3 % humidified H₂ and air at 800 ^oC showed a maximum power of 2.5W.