Synthesis and properties of gadolinium doped ceria electrolyte for IT-SOFCs by EDTA-citrate complexing method

Anjaneya, KC and Singh, Mahander Pratap (2017) Synthesis and properties of gadolinium doped ceria electrolyte for IT-SOFCs by EDTA-citrate complexing method. In: JOURNAL OF ALLOYS AND COMPOUNDS, 695 . pp. 871-876.

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Abstract

In the present study, gadolinium doped ceria (Ce0.8Gd0.2O2-delta, GDC) electrolytes at different pH have been successfully prepared by EDTA-citrate complexing method for intermediate temperature solid oxide fuel cells (IT-SOFCs). XRD, Raman, FE-SEM, TEM and electrochemical impedance spectroscopy are used for structural and electrical characterizations. XRD patterns of the GDC powder calcined at 873 K for 5 h exhibits the cubic fluorite structure with space group Fm3m. Raman spectra of sintered GDC powder confirms the formation solid solution in corroboration with XRD data. FE-SEM images of sintered GDC pellets at different pH shows well defined grains separated from grain boundaries with good densification. Highest relative density (99%) is obtained for sintered GDC pellet with pH = 10. Electrical conductivity of GDC depends on pH of the solution and the maximum conductivity is 1.6 x 10(-2) S cm(-1) at 973 K with pH = 10. These preliminary results indicate the possible application of GDC as a potential electrolyte for IT-SOFCs. (C) 2016 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	JOURNAL OF ALLOYS AND COMPOUNDS
Additional Information:	Copy right for this article belongs to the ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND
Department/Centre:	Division of Interdisciplinary Sciences > Interdisciplinary Centre for Energy Research Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	10 Feb 2017 09:33
Last Modified:	21 Feb 2019 09:16
URI:	http://eprints.iisc.ac.in/id/eprint/56209

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