Novel asymmetric anode-supported hollow fiber solid oxide fuel cell

Ni-(Y2O3)(0.08)(ZrO2)(0.92)(YSZ) anode-supported hollow fiber solid oxide fuel cell (HF-SOFC) with an outer diameter of 1.1 mm was successfully fabricated by a wet spinning/sintering process. The anode-supported hollow fiber shows a highly asymmetric structure with finger-like voids at the inner side and sponge-like pores at the outer side. Dense YSZ electrolyte layer about 6.5 mu m was deposited onto the anode hollow fiber by dip coating. La0.8Sr0.2MnO3-delta (LSM)-YSZ was acted as the composite cathode. The performance of the as-prepared HF-SOFC was tested at 650-800 degrees C with humidified H-2 as fuel and ambient air as oxidant, respectively. The cell provides maximum power densities of 285, 446, 549 and 708 mW cm(-2) at 650, 700, 750 and 800 degrees C, respectively. At 800 degrees C, the fuel utilization of the maximum power output with different fuel flow rate has been calculated. The excellent performance of the cell indicates that the HF-SOFC has great potential applications in auxiliary power units (APUs) and power sources of portable devices. (C) 2012 Elsevier B. V. All rights reserved.