Tailoring the electrolyte and cathode properties for optimizing the performance of symmetrical solid oxide fuel cells fabricated by one-step co-sintering method

Symmetrical solid oxide fuel cells (S-SOFCs) are prepared via a facile one-step co-sintering method with highly reactive Sm0.2Ce0.8O1.9 (SDC) electrolyte and Sr2Fe1.5Mo0.5O6-δ (SFM) electrodes. The phase compositions microstructures studied by XRD, TEM, FESEM techniques, the electrolyte-supported single gas-tight SDC porous SFM-SDC electrode after at 1100 °C or higher temperatures for 4 h. In particular, AC impedance spectra reveal that sintered 1200 exhibits highest ionic conductivity of ~35 mS/cm 700 °C, while polarization resistance achieves lowest value 0.32 Ω·cm2 in air sample co-sintered °C. Accordingly, output measurements carried out on It is found cell possesses peak power density 216 mW/cm2 demonstrating potential application low-cost manufacturing S-SOFCs.