Abstract
Characteristics of fuel cells with supporting Ni-YSZ anode, bilayer YSZ/GDC electrolyte with the thickness of 10 μm, and La2NiO4 + δ cathode are studied. It is shown that when humid (3% water) hydrogen is supplied to the anode and air is supplied to the cathode, the maximum values of cell’s power density are 1.05 and 0.75 W/cm2 at 900 and 800°С, respectively. After the introduction of praseodymium oxide and ceria into the cathode and the anode, respectively, the power density is ca. 1 W/cm2 at 700°С. It is found that the power density of a cell with impregnated electrodes weakly increases with the increase in temperature to ca. 1.4 W/cm2 at 900°С. The analysis of impedance spectra by the distribution of relaxation times shows that such behavior is associated with the gas-diffusion resistance of the SOFC anode. The latter is explained by the low porosity of the anode and the high rate of fuel consumption.
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Original Russian Text © A.N. Koval’chuk, A.V. Kuz’min, D.A. Osinkin, A.S. Farlenkov, A.A. Solov’ev, A.V. Shipilova, I.V. Ionov, N.M. Bogdanovich, S.M. Beresnev, 2018, published in Elektrokhimiya, 2018, Vol. 54, No. 6, pp. 623–629.
Presented at the IV All-Russian Conference “Fuel Cells and Fuel Cell based Power Plants” (with international participation) June 25‒29, 2017, Suzdal, Vladimir region.
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Koval’chuk, A.N., Kuz’min, A.V., Osinkin, D.A. et al. Single SOFC with Supporting Ni-YSZ Anode, Bilayer YSZ/GDC Film Electrolyte, and La2NiO4 + δ Cathode. Russ J Electrochem 54, 541–546 (2018). https://doi.org/10.1134/S1023193518060101
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DOI: https://doi.org/10.1134/S1023193518060101