In this study the performance evaluation of (La,Sr)(Co,Fe)O3-x (LSCF) double-layer films characterized by impedance spectroscopy between 403 and 603 degrees C to be used for intermediate temperature solid oxide fuel cells (IT-SOFCs) is presented. Two LSCF layers with different microstructures were sequentially deposited onto Ce0.9Gd0.1O1.95 (CGO) substrates in a symmetrical fashion. A first layer of La0.6Sr0.4Co0.2Fe0.8O3-x with a thickness of 7 mu m and a nano-scaled particle size was deposited by electrostatic spray deposition (ESD) technique. Different deposition conditions were used in preparing the ESD films to evaluate the influence of film morphology on the electrochemical performance. After annealing, a current collector layer of La0.58Sr0.4Co0.2Fe0.8O3-x with similar to 45 mu m in thickness and a larger particle size was deposited by screen printing. Area specific resistances (ASRs) were determined from impedance spectroscopy measurements performed in air between 403 and 603 degrees C, at 25 degrees C steps. A dependence of electrochemical performance on the morphology of the LSCF layer deposited by ESD was observed. The lowest ASR, measured during 130 h of isothermal dwelling at 603 degrees C, averaged 0.13 Omega cm(2) with negligible variation and is the lowest reported value for this composition, to the best of our knowledge. Reported results assure an excellent suitability of this type of assembly for IT-SOFCs. (C) 2011 Elsevier B.V. All rights reserved.