The Preparation And Performance Of Ni_0.6Cu_0.4BaO_x Anode Materials

Currently,the energy crisis and environment pollution has become the world economy key to sustainable development issues.The development of solid oxide fuel cell has been paid more attention.Researchers have done extensive research about how to reduce the operating temperature,increase the catalytic efficiency.reduce cell sosts and other issues.In this paper. Nio.6Cu0.4BaOx anode material was made by sol-gel.Characterized by XRD, the anode NiO and CuO powders formed to a two-phase mixture of metal oxides and did not form the alloy phase, then the small amount of Ba and Ni formed an alloy phase.Prepare the NiO-YSZ,Ni0.6Cuo.40x-YSZ,Ni0.6Cu0.4BaOx-YSZ as anode,YSZ electrolyte and LSM cathode to a electrolyte surrorted single cell,the power generation of single cell was tested.The results show that the maximum power density of NiO-YSZ anode single cell were 561mW/cm2 and 489mW/cm2 respectively in hydrogen and methane at 1000℃,but had a severe degradation of performance.The power performances of Ni0.6Cu0.40x-YSZ and Nio.6Cu0.4BaOx-YSZ anode single cell were lower than NiO-YSZ anode,and reduced the degradation.The performance of anode with Ba doped did not decrease after 10 hours test in methane.Prepare the Ni0.6Cu0.4BaOx-GDC/GDC/LSM single cell.The maximum OCV was 0.76V at 600℃and the maximum power density was 179mW/cm2 at 800℃.The power performance was lower than the cell with YSZ electrolyte. The activation resistance of Ni0.6Cu0.4BaOx-YSZ anode cell at different temperature and current density has worked out by fitting the j-V curve.The results was close in the impedance spectra.With methane as fuel gas, we found no change in microstructure and no carbon deposition of the anode after 10 hours test by anode SEM.Analysised the anode tail gas with gas chromatography when the fuel was methane.Results show that low current density benefit to methane partial oxidation reaction and increase CO content in the product.High current density benefit to methane complete oxidation reaction and increase CO2 content in the product.The results show that:Ni0.6Cu0.4BaOx anode material has good catalytic performance and good resistance to carbon deposition.