Fabrication and properties of Ba(Zr1−xCex)0.9Y0.1O2.95/NaCl composite electrolyte materials |
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Authors: | Ruisong Guo Yaping DengYanying Gao Lixin Zhang |
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Affiliation: | Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education, Tianjin University, Tianjin 300072, China |
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Abstract: | Ba(Zr1−xCex)0.9Y0.1O2.95/NaCl (x = 0.1, 0.2 and 0.3) composite electrolyte materials were fabricated with ZnO as sintering aid. The effect of ZnO on the properties of Ba(Zr1−xCex)0.9Y0.1O2.95 matrix were investigated. The phase composition and microstructure of samples were characterized by XRD and SEM, respectively. The electrochemical performances were studied by three-probe conductivity measurement and AC impedance spectroscopy. XRD results showed that Ba(Zr1−xCex)0.9Y0.1O2.95 with 2 mol% of ZnO was perovskite structure. The relative density of this sample was above 95% when sintered at 1450 °C for 6 h. By adding 10 mol% of NaCl to Ba(Zr1−xCex)0.9Y0.1O2.95 with 2 mol% of ZnO that was sintered at 1400 °C for 6 h, the conductivity was increased. The electrical conductivity of 1.26 × 10−2 S/cm and activation energy of 0.23 eV were obtained when tested at 800 °C in wet hydrogen. |
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Keywords: | Sintering Composite materials Fuel cells Ionic conduction Electrical transport |
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