A study on structural, thermal and anodic properties of V_(0.13)Mo_(0.87)O_(2.935)

摘要

V_(0.13)Mo_(0.87)O_(2.935) has never been previously studied as an anode material in Solid Oxide Fuel Cells. V_(0.13)Mo_(0.87)O_(2.935) powder was obtained by reducing acidified vanadate and molybdate solution at 60 °C by passing hydrogen sulfide gas through the solution. The obtained multicomponent mixed oxide was investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD) and thermal analysis (TG/DTA). V_(0.13)Mo_(0.87)O_(2.935) powders were mixed with ethyl cellulose and terpineol at a similar ratio to prepare the anode screen printing paste. The paste was then screen printed on the surface of the ((Y2O3)_(0.08)(ZrO2)_(0.92)) (YSZ) electrolyte with 30 mm diameter and sintered at 850 °C for 2 h. ((La_(0.60)Sr_(0.40))(Co_(0.20)Fe_(0.80))O_(3-δ)) (LSCF) was used as a cathode material and the obtained solid oxide fuel cell was tested for the temperatures of 700, 750 and 800 °C and the maximum values of 0.38 ± 0.06 A/cm~2 and 0.18 ±0.03 W were respectively obtained as current density and power at 800 °C in the cell.