Preparation and Performance of Sr0.55Na0.45SiO3-δ Solid Electrolyte
In this work,Sr0.55Na0.45SiO3-δ electrolyte material was prepared by the solid state reaction method at different sintering temperatures,and the samples were analyzed by SEM,XRD,and electrochemical impedance spectroscopy.The XRD results show that pure-phase Sr0.55Na0.45SiO3-δ was obtained by the solid-state reaction method at 950 ℃ for 2 h.The SEM analysis and density determination showed that Sr0.55Na0.45SiO3-δ have good sintering performance,with a relative density exceeding 99%after sintering at 1000 ℃ for 2 h.Electrochemical impedance spectroscopy analysis revealed that Sr0.55Na0.45SiO3-δ has excellent electrical performance,with conductivity of 0.01501 S·cm-1 and 0.0677 S·cm-1 at 600 ℃ and 800 ℃,respectively,and conductivity activation energy of 0.75 eV.The study suggests that the materials prepared in this paper have the potential to be ideal electrolyte materials for intermediate-temperature solid oxide fuel cells(IT-SOFCs).