Ni/YSZ Anode Impregnated La2O3 on Anti-carbon Deposition of SOFC Cell

For the planar anode-supported solid oxide fuel cell with Ni-YSZ anode, YSZ electrolyte was prepared by aqueous tape casting and La2O3 was impregnated into the Ni-YSZ anode. Traditional composite LSM-YSZ was used as the cathode. Microstructure and composition of the single cell were measured by scanning electron microstrscope(SEM)and energy dispersive spectra(EDS). When using ethanol/steam as fuel, the power density and impedance spectra of the single cell were measured by cyclic voltammetry and AC impedance method at 750 degrees C. The results showed that impregnated La2O3 particles with size of 90 nm were distributed uniformly around the pores of the anode. The single cell with impregnated La2O3 exhibited more stable performance than the cell without impregnated La2O3. With the increase of loading of La2O3, the single cell showed better performance and better anti-carbon deposition ability. The results show that degradation rate of the single cell is 0.09%/h after operating at 7 h with the La2O3 loading of 2.4wt%.