| Intermediate temperature solid oxide fuel cell (IT-SOFC) has been widelyinvestigated worldwide as its cost can be reduced substantially for successfulcommercialization of SOFC technologies. However,to lower the operating temperature ofSOFCs from the traditional1000to600-800℃requires a cathode with highelectrocatalytic activity. then improving the electrochemical performance of cathode ismainly composed of the following three aspects: Research new material; composite ofthe material with a high ionic conductance; change the microstructure cathode. Thisarticle obtains from the change of cathode microstructure, using the sol-gel hydrothermaland electrostatic spinning to Prepare The different microstructure and discuss the fluenceof electrical performance in different microstructureBy XRD SEM TEM TG-DTG testing, Preparation of three kinds of method of LSCFpowder phase and microstructure was tested. The results show that differenttechnological conditions and preparation of LSCF have a smaller effect on Crystal objectand had a greater influence on the microstructure of powder. Sol-gel method LSCFpowder is granular. Preparation of hydrothermal precipitation in DMF solvent LSFCpowder is porous spherical and Electrostatic spinning preparation of LSCF powder isnano fiber structure.By the SEM and cathode of Impedance diagram, Discusses the cathode of sinteringtemperature on the microstructure and performance of cathode.Cathode in1000℃calcine has a poor combine with the electrolyte and Grain grew up and agglomeratereunion in1200℃calcine.Cathode in1100calcine can get a well microstructure.Thethree different preparation methods of LSCF cathode used in single cell SOFC Theoutput power of750order batteries to be testedhydrothermal method Electrostaticspinning method and sol-gel method of the output power of single battery cathode were0.95wcm-20.78wcm-2and0.64wcm-2... |
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