Pencirian Mikrostruktur Katod La-Sr-Co-Fe-O bagi Sel Fuel OksidaPepejal Bersuhu Sederhana (It-Sofc)(Microstructure Characterization of La-Sr-Co-Fe-O Cathode for IntermediateTemperature Solid Oxide Fuel Cell (It-Sofc))

Perovskite oxide La1-xSrxCo0.2Fe0.8O3-δ (LSCF) with x = 0.3-0.5, an excellent mixed-ionic conductor that can be used as cathode material for the intermediate temperature solid oxide fuel cell (IT-SOFC) has been developed using the sol-gel method. The resulting powder was characterised using X-Ray Diffraction (XRD) which showed that pure crystals of perovskite were fully formed after calcination at 900°C. The effect of sintering temperature on the microstructure was observed using Scanning Electron Microscopy (SEM) analysis. The results showed that the LSCF perovskite have the optimum porosity of 30% after sintered at 900°C and thus enable the oxygen reduction occurred easily. FTIR results revealed that only Fe-O bond exists in the LSCF powder and no impurities detected.