High-performance anode-supported solid oxide fuel cell with impregnated electrodes

• Published in: Journal of power sources 2015-08, Vol.288, p.20-25
• Main Authors: Osinkin, D.A., Bogdanovich, N.M., Beresnev, S.M., Zhuravlev, V.D.
• Format: Article
• Language: English
• Subjects: CeO2; Combustion synthesis; Impregnation; Ni-cermet supported SOFC
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2015.04.098

The 61%NiO + 39%Zr0.84Y0.16O1.92 (NiO-YSZ) and 56%NiO + 44%Zr0.83Sc0.16Ce0.01O1.92 (NiO-CeSSZ) composite powders have been prepared using two-steps and one-step combustion synthesis, respectively. The Ni-YSZ anode substrate with a low level of electrical resistance (less than 1 mOhm cm) and porosity of about 53% in the reduced state was fabricated. The functional layer of the anode with the high level of electrochemical activity was made of NiO-CeSSZ. The single anode-supported solid oxide fuel cell with the bi-layer Ni-cermet anode, Zr0.84Sc0.16O1.92 film electrolyte and the Pt + 3% Zr0.84Y0.16O1.92 cathode was fabricated. The power density and the U–I curves of the fuel cell at initial state and after impregnation of the cathode and anode by praseodymium and cerium oxides, respectively, have been measured at different temperatures. The maximum of power density of the initial fuel cell was 0.35 W cm−2 at conditions of wet hydrogen (air) supply to the anode (cathode) at 900 °C. After the electrodes were impregnated, the value of power density increased by seven times and was approximately 2.4 W cm−2 at 0.6 V. It was suggested that after the electrodes impregnation the polarization resistance of the fuel cell was determined by the gas diffusion in the supported anode. •The powders for bi-layer Ni-cermet anode was produced by combustion synthesis.•High-performance SOFC have been produced using simple methods.•Impregnation of the electrodes has increased power of SOFC by seven times.•The SOFC with impregnation electrodes revealed the power of 2.5 W cm−2 at 900 °C.•Impregnation reduced resistances of all electrode reactions except the gas-diffusion.