Lanthanum Strontium Manganite Powders Synthesized by Gel-Casting for Solid Oxide Fuel Cell Cathode Materials |
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| Authors: | Lan Zhang Yujun Zhang Y D Zhen San Ping Jiang |
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| Affiliation: | Key Lab for Liquid Structures, School of Materials Science and Engineering, Shandong University, Jinan 250061, China; School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798, Singapore |
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| Abstract: | Lanthanum strontium manganite ((La0.8Sr0.2)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. |
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