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

Anjaneya, K C 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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Official URL: http://dx.doi.org/10.1016/j.jallcom.2016.10.175

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
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Additional Information: Copy right for this article belongs to the ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
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Date Deposited: 10 Feb 2017 09:33
Last Modified: 10 Feb 2017 09:33
URI: http://eprints.iisc.ernet.in/id/eprint/56209

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