Ceria co-doped with calcium (Ca) and strontium (Sr): a potential candidate as a solid electrolyte for intermediate temperature solid oxide fuel cells |
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Authors: | Nandini Jaiswal Devendra Kumar Shail Upadhyay Om Parkash |
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Institution: | 1. Department of Ceramic Engineering, Indian Institute of Technology, Banaras Hindu University, Varanasi, 221005, India 2. Department of Applied Physics, Indian Institute of Technology, Banaras Hindu University, Varanasi, 221005, India
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Abstract: | Co-doped samples of Ce0.95?x Ca0.05Sr x O1.95?x , where (x?=?0.00, 0.01, 0.02, and 0.03), have been prepared by auto-combustion method and characterized to explore their use as a solid electrolyte for intermediate temperature solid oxide fuel cells (IT-SOFCs). Crystal structure, microstructure, and ionic conductivity have been characterized by X-ray diffraction, scanning electron microscopy, and impedance spectroscopy, respectively. All the compositions have been found to be single phase. Results show that the samples co-doped with Ca and Sr exhibit higher ionic conductivity than the samples singly doped with Ca in the intermediate temperature range. Ce0.93Ca0.05Sr0.02O2?δ exhibits maximum conductivity among all the compositions. This may be a potential candidate as a solid electrolyte for IT-SOFCs. |
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