Synthesis and properties of ceria based electrolyte for IT-SOFCs. (28th September 2016)

• Record Type: Journal Article
• Authors: Yang, Jie; Ji, Bifa; Si, Jingyu; Zhang, Quanzheng; Yin, Qiyi; Xie, Jingsong; Tian, Changan
• Is Part Of: International journal of hydrogen energy. Volume 41:Number 36(2016)
• Page Start: 15979
• Page End: 15984
• Publication Date: 2016-09-28
• Subjects: IT-SOFCs -- Ceria -- Co-doping -- Sol–gel method; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2016.04.212
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Fluorite oxides Ce0.8 Y0.18 M0.02 O2 − δ (denoted as MYDC for M = Ca, Sr, Fe and La), were prepared by the sol–gel method used as electrolytes for intermediate-temperature solid oxide fuel cells (IT-SOFCs). X-ray diffraction data show that all the compositions were obtained with highly phase-pure cubic fluorite structure. The relatively density of all the samples sintered at 1400 °C is more than 95%. Surface morphology has been studied by scanning electron microscope showing a dense microstructure. AC impedance spectroscopy measurements have been carried out to study the ionic conductivity of the samples in the temperature range 400–800 °C. In all composition, Ce0.8 Y0.18 La0.02 O2 − δ shows the maximum conductivity of 0.057 S/cm at 800 °C and shows a good prospect of application in IT-SOFCs. Highlights: Fluorite oxides Ce0.8 Y0.18 M0.02 O2 − δ (denoted as MYDC for M = Ca, Sr, Fe and La), were prepared by the sol–gel method. The relatively density of all the samples sintered at 1400 °C is more than 95%. Ce0.8 Y0.18 La0.02 O2 − δ shows the maximum conductivity of 0.057 S/cm at 800 °C among all the compositions investigated.