The server is under maintenance between 08:00 to 12:00 (GMT+08:00), and please visit later.
We apologize for any inconvenience caused
Login  | Sign Up  |  Oriprobe Inc. Feed
China/Asia On Demand
Journal Articles
Bookmark and Share
Chemical synthesis and properties of La1.9Ba0.1Mo1.9Mn0.1O9 as electrolyte for IT-SOFCs
Pages: 423-428
Year: Issue:  5
Journal: Journal of Rare Earths

Keyword:  electrolyteelectrical conductivityLa 2 Mo 2 O 9sol-gelrare earths;
Abstract: The highly phase-pure electrolyte materials with composition La1.9Ba0.1Mo1.9Mn0.1O9(LBMMO) was prepared by the sol-gel auto-combustion method for intermediate-temperature solid oxide fuel cells(IT-SOFCs). The details of gel’s auto-combustion, phase evolution, sintering, thermal expansion and electrochemical performance of LBMMO were investigated by means of thermo-gravimetry(TG), X-ray diffraction(XRD), scanning electron microscopy(SEM), transmission electron spectroscopy(TEM), thermal expansion curve(TEC) and complex impedance spectra. The results showed that the highly phase-pure electrolyte LBMMO could be obtained after calcining at 600 °C. The sample sintered at 900 °C for 4 h in air exhibited a better sinterability, and the relative density of LBMMO was higher than 96%. The electrical conductivities of the sample were 6.7×10-3 and 25.9×10-3 S/cm at 700 and 800 °C in air, respectively. Results also showed that LBMMO had moderate thermal expansion(α=16.3×10-6 K-1, between room temperature and 800 °C) and an electrical activation energy equal to 1.32 eV).
Related Articles
No related articles found