Abstract
Micro tubular SOFCs have shown characteristic features as high thermal stability during rapid heat cycling and high volumetric power output, which is expected to overcome several problems shown in conventional (planar) SOFCs. Here we report light-weighted tubular solid-oxide fuel cells under 1 mm diameter operable under 600oC. The cell consists of ordinary materials but has new anode microstructure with high porosity of 46 % (before reduction) and reduced anode thickness of less than 200 B12-0794RB12-0794R mm. Thus, the weight of the single cell was 0.015 g per 1 cm length, 0.06 g per 1cm2 surface (electrode) area) The results showed that the performance of the cell was 628, 1017 and 1293 mW/cm2 at 500, 550 and 600oC with wet H2 fuel, respectively.
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