Fabrication of dense Ce0.9Mg0.1P2O7-PmOn composites by microwave heating for application as electrolyte in intermediate-temperature fuel cells |
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| Authors: | Bhupendra Singh Nitika Devi Lakshya Mathur Rajesh K Singh Aman Bhardwaj Sun-Ju Song Dirk Henkensmeier |
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| Affiliation: | 1. Department of Ceramic Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi 221005, India;2. Department of Physics and Astronomical Sciences, Central University of Himachal Pradesh, Dharamsala, Himachal Pradesh 176215, India;3. School of Materials Science and Engineering, Chonnam National University, Buk-gu, Gwang-Ju 500-757, Republic of Korea;4. Fuel Cell Research Center, Korea Institute of Science and Technology, Hwarangro 14-gil 5, Seongbukgu, 02792 Seoul, Republic of Korea |
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| Abstract: | In the present work, we report a method of fabrication of dense 10 mol% Mg2+-doped cerium pyrophosphate-phosphate (Ce0.9Mg0.1P2O7-PmOn; CMP-P) composites by microwave heat-treatment of the preformed Ce0.9Mg0.1P2O7 substrates in the presence of phosphoric acid. The composite was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS). The microwave heating at 375 °C for 5 min resulted in the formation of dense CMP-P composites which retained most of the pyrophosphate phase. The electrical conductivity was extracted from the EIS data and for the CMP-P composite prepared by H3PO4 loading for 10 h and microwave heat-treatment for 5 min it was found to be >10?2 S m?1 in 100–250 °C range with a maximum of 0.062 S cm?1 at 190 °C, which was significant for its application as electrolyte in intermediate temperature fuel cells. |
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| Keywords: | Cerium pyrophosphate-phosphate composites Microwave heating Proton conducting electrolytes Fuel cells |
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