The Physics Society of Iran Iranian Journal of Physics Research 1682-6957 20 2 2020 08 22 Preparation and characterization of La0.6Sr0.4Fe0.8Mn0.2O3-δ cathode of intermediate temperature solid oxide fuel cells Preparation and characterization of La0.6Sr0.4Fe0.8Mn0.2O3-δ cathode of intermediate temperature solid oxide fuel cells 245 257 1613 10.47176/ijpr.20.2.36111 FA F Yadollahi Farsani Department of Physics, Isfahan University of Technology, Isfahan, Iran M Jafari Department of Physics, Isfahan University of Technology, Isfahan, Iran E Shahsavari Department of Physics, Isfahan University of Technology, Isfahan, Iran H Shakeripour Department of Physics, Isfahan University of Technology, Isfahan, Iran H Salamati Department of Physics, Isfahan University of Technology, Isfahan, Iran Journal Article 2019 03 05 The aim of this study is to investigate the  properties of the  La<sub>0.6</sub>Sr<sub>0.4</sub>Fe<sub>0.8</sub>Mn<sub>0.2</sub>O<sub>3-δ </sub>(LSFM)compound as cathode of intermediate temperature solid oxide fuel cells. The LSFM compound was synthesized by the  sol-gel process. Thestructural, electrical and electrochemical properties of LSFMwere tested via X-ray diffraction (XRD), scanning electron microscopy (SEM), high temperature four-probe resistivity measurement (HTRM) and electrochemical impedance spectroscopy (EIS). The X-ray pattern showed  that sample had a Rhombohedra structure and space group symmetry of LSFM <em>is R-3c;</em> also, the LSFM had  good chemical compatibility with YSZ electrolyte. The conductivity of the sample was increased with raising the temperature. The maximum electrical conductivities for the LSFM compound were  equal to  3.64 S.cm<sup>-1</sup> in air at 739 ℃. The cathode area specific resistance of LSFM was 1.69, 1.01, 0.63, 0.52, and 0.45 Ω cm<sup>2</sup> at 600, 650, 700, 750, and 800 ℃, respectively  The aim of this study is to investigate the  properties of the  La<sub>0.6</sub>Sr<sub>0.4</sub>Fe<sub>0.8</sub>Mn<sub>0.2</sub>O<sub>3-δ </sub>(LSFM)compound as cathode of intermediate temperature solid oxide fuel cells. The LSFM compound was synthesized by the  sol-gel process. Thestructural, electrical and electrochemical properties of LSFMwere tested via X-ray diffraction (XRD), scanning electron microscopy (SEM), high temperature four-probe resistivity measurement (HTRM) and electrochemical impedance spectroscopy (EIS). The X-ray pattern showed  that sample had a Rhombohedra structure and space group symmetry of LSFM <em>is R-3c;</em> also, the LSFM had  good chemical compatibility with YSZ electrolyte. The conductivity of the sample was increased with raising the temperature. The maximum electrical conductivities for the LSFM compound were  equal to  3.64 S.cm<sup>-1</sup> in air at 739 ℃. The cathode area specific resistance of LSFM was 1.69, 1.01, 0.63, 0.52, and 0.45 Ω cm<sup>2</sup> at 600, 650, 700, 750, and 800 ℃, respectively  solid oxide fuel cell cathode electrical conductivity area specific resistance https://ijpr.iut.ac.ir/article_1613_69d658d0b2859e32cd4dc3b970c8496c.pdf