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In this work, Pr 0.6 Sr 0.4 FeO 3− δ –Ce 0.9 Pr 0.1 O 2− δ (PSFO–CPO) nanofibers were synthesized by a one-step electrospin technique for use in intermediate-temperature solid oxide fuel cell (IT-SOFC) applications. PSFO–CPO nanofibers were produced with a diameter of about 100 nm and lengths exceeding tens of microns. The thermal expansion coefficient (TEC) matches with standard GDC electrolytes and the resulting conductivity also satisfies the needs of IT-SOFCs cathodes. EIS analysis of the nanofiber structured electrode gives a polarization resistance of 0.072 Ω cm 2 at 800 °C, smaller than that from the powdered cathode with the same composition. The excellent electrochemical performance can be attributed to the well-constructed microstructure of the nanofiber structured cathode, which promotes surface oxygen diffusion and charge transfer processes. All the results imply that the one-step electrospin method is a facile and practical way of improving the cathode properties and that PSFO–CPO is a promising cathode material for IT-SOFCs. [ABSTRACT FROM AUTHOR]

A 10 mol%Sc 2 O 3 , 1 mol%CeO 2 stabilized-ZrO 2 (SSZ) powder was successfully prepared using the sol–gel method. Subsequent SSZ electrolyte pellets were prepared by tape casting technique and sintered at 1400 °C, 1450 °C, 1500 °C, 1550 °C and 1600 °C. These were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS). SSZ showed a pure cubic phase after sintering, the grain size of SSZ increased with the increase of sintering temperature. The SSZ sintered at 1550 °C showed the highest ion conductivity. The maximum power densities of Ni-SSZ/SSZ/La 0.8 Sr 0.2 MnO 3− δ (LSM)-SSZ single cells sintered at 1550 °C were 0.18, 0.36, 0.51 and 0.72 W cm −2 at 650, 700, 750 and 800 °C, respectively. The polarization resistance ( R p ) of the single cell attained 0.201 Ω cm 2 at 800 °C. [ABSTRACT FROM AUTHOR]