La0.6Sr0.4Co0.2Fe0.8O3 (- delta) (LSCF) perovskite nanostructures were synthesised using a 42 kHz ultrasound assisted synthesis technique for the fabrication of electrodes in the intermediate and/or low temperature solid oxide fuel and electrolysis cells (SOFCs/SOECs). The obtained nanomaterials were dried at 110 degrees C followed by calcination in a normal atmosphere at various temperatures from 400 to 1000 degrees C for 2 h. Powder characteristics such as crystal structure, thermal decomposition, particle size and morphology were analysed. The transmission electron microscopy (TEM) study revealed the uniform equi-axial shape and growth of the obtained nanostructures with respect to the calcination temperature till 800 degrees C. The structural and chemical analyses confirmed the existence of LSCF and CoFe2O4 phases. (C) 2015 Elsevier B.V. All rights reserved.