Design and Fabrication of Lightweight, Submillimeter Tubular Solid Oxide Fuel Cells

Here we report lightweight, high-performance tubular solid oxide fuel cells (SOFCs) with 0.8 mm diameter operable at/under 550 ° C . The SOFCs consist of ordinary materials with a well-designed anode microstructure with porosity of 46% (before reduction) and reduced anode thickness less than 200 μ m . Thus, the weight of the SOFC was realized to be 0.015 g per 1 cm tube length (electrode area = 0.25 cm 2 ). The single-cell performance test showed that the peak power densities of the SOFC were 273, 628, and 1017 mW ∕ cm 2 at 450, 500, and 550 ° C with wet H 2 fuel, respectively.