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

doi:10.15541/jim20160279

Abstract

Abstract:

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℃. 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 La₂O₃loading of 2.4wt%.

Key words: solid oxide fuel cell (SOFC), anti-carbon deposition, La2O3, impregnation

CLC Number:

TQ174

CHENG Liang, LUO Ling-Hong, SHI Ji-Jun, SUN Liang-Liang, XU Xu, WU Ye-Fan, HU Jia-Xing. Ni/YSZ Anode Impregnated La₂O₃ on Anti-carbon Deposition of SOFC Cell[J]. Journal of Inorganic Materials, 2017, 32(3): 241-246.

Figures/Tables 6

Fig. 1 SEM images of La2O3 impregnation anode section(a) Single cell; (b) 0wt%; (c) 2.4wt%

Fig. 2 SEM-EDS results of La2O3 impregnation anode section

Fig. 3 I-V-P and EIS curves of cells with different amounts of La2O3 impregnation(a) 0wt%; (b) 1.1wt%; (c) 1.9wt%; (d) 2.4wt%

Fig. 4 Stability curves of different cells

Fig. 5 SEM-EDS of cells with different amounts of La2O3 impregnation using ethanol as fuel(a) 0wt%; (b) 2.4wt%

Fig. 6 SEM images of cell without La2O3 impregnation using ethanol as fuel after 3.5 h

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

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