Development of Sr0.6Ba0.4Ce0.9Pr0.1O3-δ Electrolyte for Proton-Conducting Solid Oxide Fuel Cell Application

• Published in: IOP conference series. Earth and environmental science 2019-06, Vol.268 (1)
• Main Authors: Norman, N W, Wan Yusoff, W N A, Jais, A A, Somalu, M R, Muchtar, A
• Format: Article
• Language: English
• Subjects: Boiling; Corrosion resistance; Decomposition; Electrolytes; Electrolytic cells; Fuel cells; Fuel technology; Glycine; Grain boundaries; Grain growth; Morphology; Pellets; Powder; Protons; Scanning electron microscopy; Sintering (powder metallurgy); Solid oxide fuel cells; Structural stability; Synthesis; Thermal decomposition; Thermogravimetric analysis; X-ray diffraction
• ISSN: 1755-1307; 1755-1315
• DOI: 10.1088/1755-1315/268/1/012147

Sr0.6Ba0.4Ce0.9Pr0.1O3-δ is synthesized by the glycine-nitrate method. The synthesized powder and resultant electrolyte pellet are systematically characterised for proton-conducting solid oxide fuel cell application. The thermal decomposition and purity of the electrolyte powder were analysed by thermogravimetric analysis (TGA) and X-ray diffraction (XRD), respectively. The morphological structure and chemical stability of the electrolyte pellets are examined by field-emission scanning electron microscopy (FESEM) and XRD, respectively. The selective material decomposes at 1000 °C as recorded by TGA. The calcined powder at 1000 °C is used to produce the electrolyte pellet. The pellet sintered at 1400 °C achieves the average relative density of 94% as measured by Archimedes' method and displays good grain growth with a visible grain boundary. The chemical stability of the pellet is also determined under boiling water for 2 h. The tolerance towards H2O for the sample improved with the presence of Sr upon exposure to boiling water even though some amorphous phase forms. Based on the result, Sr0.6Ba0.4Ce0.9Pr0.1O3-δ is considered as a potential electrolyte for proton-conducting solid oxide fuel cells.