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Role of lithium oxide as a sintering aid for a CGO electrolyte fabricated via a phase inversion technique

The incorporation of lithium oxide (Li2O) as a sintering additive has specific advantages for electrolyte membrane fabrication. However, the viability of the sintering additive to be implemented in a phase inversion technique is still ambiguous. In this first attempt, lithium was doped into a gadoli...

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Main Authors: Jamil, Siti Munira, Othman, Mohd. Hafiz Dzarfan, A. Rahman, Mukhlis, Jaafar, Juhana, Ismail, Ahmad Fauzi, Mohamed, Mohamad Azuwa
Format: Article
Published: Royal Society of Chemistry 2015
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TP Chemical technology
Online Access:http://eprints.utm.my/id/eprint/55354/
http://dx.doi.org/10.1039/c5ra09268j
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spelling my.utm.553542016-09-04T02:06:17Z http://eprints.utm.my/id/eprint/55354/ Role of lithium oxide as a sintering aid for a CGO electrolyte fabricated via a phase inversion technique Jamil, Siti Munira Othman, Mohd. Hafiz Dzarfan A. Rahman, Mukhlis Jaafar, Juhana Ismail, Ahmad Fauzi Mohamed, Mohamad Azuwa TP Chemical technology The incorporation of lithium oxide (Li2O) as a sintering additive has specific advantages for electrolyte membrane fabrication. However, the viability of the sintering additive to be implemented in a phase inversion technique is still ambiguous. In this first attempt, lithium was doped into a gadolinium-doped ceria (CGO) crystal structure using the metal nitrate doping method and calcined at four different temperatures, i.e. 140, 300, 500 and 700 degrees C. The prepared Li-doped CGO (Li-CGO) powders were analyzed by thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray diffraction (XRD), N-2 adsorption/desorption, and Fourier-transform infrared (FTIR). Primary results demonstrate that the calcination temperature of the Li-CGO influences the condition of the electrolyte suspension. Li-CGO calcined at 700 degrees C (D-700), as compared with other Li-CGO, possessed a strong interaction between the Li and CGO. The D-700 was then incorporated into the electrolyte flat sheet membrane which was prepared by a phase inversion technique. The membrane was then sintered at different sintering temperatures from 1350 degrees C to 1450 degrees C. In comparison with the unmodified CGO, the morphological results suggest that the Li2O can remarkably promote the densification of CGO at a lower sintering temperature (1400 degrees C). These findings help to promote the use of sintering additives in a ceria-based electrolyte suspension specifically for the phase inversion technique. Royal Society of Chemistry 2015 Article PeerReviewed Jamil, Siti Munira and Othman, Mohd. Hafiz Dzarfan and A. Rahman, Mukhlis and Jaafar, Juhana and Ismail, Ahmad Fauzi and Mohamed, Mohamad Azuwa (2015) Role of lithium oxide as a sintering aid for a CGO electrolyte fabricated via a phase inversion technique. RSC Advances, 5 (72). pp. 58154-58162. ISSN 2046-2069 http://dx.doi.org/10.1039/c5ra09268j DOI:10.1039/c5ra09268j
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TP Chemical technology
spellingShingle TP Chemical technology
Jamil, Siti Munira
Othman, Mohd. Hafiz Dzarfan
A. Rahman, Mukhlis
Jaafar, Juhana
Ismail, Ahmad Fauzi
Mohamed, Mohamad Azuwa
Role of lithium oxide as a sintering aid for a CGO electrolyte fabricated via a phase inversion technique
description The incorporation of lithium oxide (Li2O) as a sintering additive has specific advantages for electrolyte membrane fabrication. However, the viability of the sintering additive to be implemented in a phase inversion technique is still ambiguous. In this first attempt, lithium was doped into a gadolinium-doped ceria (CGO) crystal structure using the metal nitrate doping method and calcined at four different temperatures, i.e. 140, 300, 500 and 700 degrees C. The prepared Li-doped CGO (Li-CGO) powders were analyzed by thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray diffraction (XRD), N-2 adsorption/desorption, and Fourier-transform infrared (FTIR). Primary results demonstrate that the calcination temperature of the Li-CGO influences the condition of the electrolyte suspension. Li-CGO calcined at 700 degrees C (D-700), as compared with other Li-CGO, possessed a strong interaction between the Li and CGO. The D-700 was then incorporated into the electrolyte flat sheet membrane which was prepared by a phase inversion technique. The membrane was then sintered at different sintering temperatures from 1350 degrees C to 1450 degrees C. In comparison with the unmodified CGO, the morphological results suggest that the Li2O can remarkably promote the densification of CGO at a lower sintering temperature (1400 degrees C). These findings help to promote the use of sintering additives in a ceria-based electrolyte suspension specifically for the phase inversion technique.
format Article
author Jamil, Siti Munira
Othman, Mohd. Hafiz Dzarfan
A. Rahman, Mukhlis
Jaafar, Juhana
Ismail, Ahmad Fauzi
Mohamed, Mohamad Azuwa
author_facet Jamil, Siti Munira
Othman, Mohd. Hafiz Dzarfan
A. Rahman, Mukhlis
Jaafar, Juhana
Ismail, Ahmad Fauzi
Mohamed, Mohamad Azuwa
author_sort Jamil, Siti Munira
title Role of lithium oxide as a sintering aid for a CGO electrolyte fabricated via a phase inversion technique
title_short Role of lithium oxide as a sintering aid for a CGO electrolyte fabricated via a phase inversion technique
title_full Role of lithium oxide as a sintering aid for a CGO electrolyte fabricated via a phase inversion technique
title_fullStr Role of lithium oxide as a sintering aid for a CGO electrolyte fabricated via a phase inversion technique
title_full_unstemmed Role of lithium oxide as a sintering aid for a CGO electrolyte fabricated via a phase inversion technique
title_sort role of lithium oxide as a sintering aid for a cgo electrolyte fabricated via a phase inversion technique
publisher Royal Society of Chemistry
publishDate 2015
url http://eprints.utm.my/id/eprint/55354/
http://dx.doi.org/10.1039/c5ra09268j
_version_ 1643653772573933568
score 13.211869

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