Abstract
The porous nickel-molybdenum alloy sheets with 25 and 100 cm2 in size and 0.2 mm in thickness are used as supporting substrates in producing metal-supported solid oxide fuel cells. The atmospheric plasma spraying (APS) is applied for coating all functional layers in sequence. These cells have YSZ-Ni and GDC-Ni as anode layers, LDC as diffusion barrier layer, LSGM as electrolyte layer, and 50%SDC-50%SSC and 25%SDC-75%SSC as cathode layers. The 25 cm2 cell delivers maximum power densities of 313, 581, 890 and 1098 mW cm-2 at 600, 650, 700 and 750°C respectively. The assembled single cell stack of 100 cm2 cell shows power of 33 W (407 mW cm-2) and 39.4 W (486 mW cm-2) at 700 and 750°C. The long-term stability test of this single cell stack shows a degradation rate of about 0.93% k-1 h-1 over 800 h at 300 mA cm-2 and 700°C.
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