Synthesis of La_0.8Sr_0.2MnO₃ Nano-Powders Using Glycine-Nitrate Process for Anode of High Temperature Electrolysis System

Lanthanum, strontium and manganese (LSM), as an oxygen-electrode (anode) material for a high temperature electrolysis system, was synthesized using a modified-glycine nitrate process. The synthesis of LSM was carried out at three different conditions and the starting materials and solvent were also varied in this study. The La:Sr:Mn ratio was fixed to 8:2:10 in the preparation. Based on the result of thermogravimetric analysis-differential scanning calorimetry, the prepared LSM formula was calcined at 800 °C and then sintered further at 1200 °C to remove the organic residues. A perovskite phase and secondary phases (Mn₂O₄ and La₂O₃) were detected by X-ray diffraction of the sintered powder. Scanning electron microscopy revealed the particle size of the agglomerated powder to be more than 200 nm. The Brunauer–Emmett–Teller surface area measurements under the three different conditions were 2.9796 m²/g, 0.5272 m²/g, and 1.8870 m²/g.