Fabrication of dense Ce0.9Mg0.1P2O7-PmOn composites by microwave heating for application as electrolyte in intermediate-temperature fuel cells

Title
Fabrication of dense Ce0.9Mg0.1P2O7-PmOn composites by microwave heating for application as electrolyte in intermediate-temperature fuel cells
Authors
헨켄스마이어디억Bhupendra SinghNitika DeviLakshya MathurRajesh K. SinghAman BhardwajSun-Ju Song
Keywords
Cerium pyrophosphate-phosphate composites; Microwave heating; Proton conducting electrolytes; Fuel cells
Issue Date
2018-04
Publisher
Ceramics international
Citation
VOL 44, NO 6-6175
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.
URI
http://pubs.kist.re.kr/handle/201004/67847
ISSN
0272-8842
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KIST Publication > Article
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