Abstract
A tubular anode-supported solid oxide fuel cell with a double-layer anode for the direct conversion of CH4 has been prepared and operated at 800 °C successfully. The double-layer anode was composed of NiO–YSZ and CoO–NiO–SDC acting as supporting layer and active reforming layer, respectively. At 800 °C, a maximum power density of 350 mW cm−2 was obtained with CH4 as fuel and air as oxidant. The time-dependent impedance spectra of the tubular cell were examined and discussed. No carbon deposition was observed on the surface of the anode when the cell was operated at a constant current density of 250 mA cm−2.
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