Lanthanum Strontium Manganite Powders Synthesized by Gel‐Casting for Solid Oxide Fuel Cell Cathode Materials - Progress in Nanotechnology - Wiley Online Library

Lanthanum strontium manganite ((La_0.8Sr_0.2)_0.9MnO₃; LSM) powder was successfully synthesized by an aqueous gel-casting technique, using carbonaceous precursors. Both thermal and X-ray diffraction analysis confirmed that the gel-casting LSM powder formed a single perovskite phase at 850°C, which is 100°-150°C lower than that of the LSM powder prepared by the conventional solid-state reaction route. The significantly reduced phase formation temperature of the gel-casting LSM powder is most likely due to the homogeneously distributed and immobilized precursor particles in a polymeric network, promoting the sintering and crystallization process. The LSM electrode prepared by the gel-cast LSM powder showed good electrocatalytic activity for the O₂ reduction reaction for solid oxide fuel cells. The phase formation, micro-structure, particle size, and electrochemical performance of the gel-cast LSM powders were investigated and characterized. For the purpose of comparison, the phase formation and sintering of LSM powder prepared by the conventional solid-state reaction method were also investigated.

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