The Nd1.8SrO2NiO4+delta was prepared by sol-gel, microwave combustion and solid-state reaction. The highest dc conductivity (sigma = 61 S cm(-1) at 660 degrees C) for sal-gel derived Nd1.8Sr0.2NiO4+delta compared to those prepared by microwave combustion and solid-state reaction was due to lowest crystallite size (165.92 nm) and high sintered density (90%). Symmetric cells configured as cathode/electrolyte/cathode were fabricated by spin coating the cathode ink on gadolinium doped ceria (GDC) electrolyte. The lowest area specific resistance (ASR) value of 0.6 Omega cm(2) was obtained at 700 degrees C for sol-gel derived Nd1.8Sr0.2NiO4+delta. Particle size distribution of Nd1.8Sr0.2NiO4+delta cathode was largely dependent on the synthesis route, and that influenced the ASR. Electrochemical performance suggests absorption of oxygen by Nd1.8Sr0.2NiO4+delta lattice is the rate-limiting step. (C) 2014 Elsevier B.V. All rights reserved.