Abstract
A facile chemically lithium/sodium insertion method has been developed to prepare Li/Na modified-NiO composites (Li/Na-NiO). The single cells were fabricated with a Li/Na modified NiO-Ce0.8Sm0.2O1.9 (SDC) composite anode screened on a 300µm La0.9Sr0.1Ga0.8Mg0.2O3-δ(LSGM) electrolyte and a composite cathode consisting of Sr0.95Ce0.05CoO3-δ and SDC (30wt%). The cells with Li/Na modified Ni-SDC anode material deliver much higher open circuit voltages (OCV) than that of the cell with pure Ni-SDC anode. When wet CH4 was used as fuel, the peak power densities of the cells with the Li and Na modified Ni-SDC anode reach about 212mW cm-2 and 231mW cm-2 at 800oC, respectively, which were much higher than that with the pristine Ni-SDC anode. In addition, the cells with Li/Na modified Ni-SDC anode materials show better long-term stability at 800oC. The preliminary results demonstrate that the Li/Na modified Ni-SDC anode materials are promising alternative anode for hydrocarbon-fueled solid oxide fuel cells.
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