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Co-extruded dual-layer hollow fiber with different electrolyte structure for a high temperature micro-tubular solid oxide fuel cell

In this study, the phase inversion-based co-extrusion method was employed to fabricate a structural-improved electrolyte/anode dual-layer hollow fiber (HF) precursor, which was then co-sintered at 1450ï¿½ï¿½C. The electrolyte structures were thoroughly investigated by varying the loading of electrol...

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Main Authors:	Ahmad, S. H., Jamil, S. M., Othman, M. H. D., Rahman, M. A., Jaafar, J., Ismail, A. F.
Format:	Article
Published:	Elsevier Ltd 2017
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/77135/ https://www.scopus.com/inward/record.uri?eid=2-s2.0-85006713538&doi=10.1016%2fj.ijhydene.2016.06.044&partnerID=40&md5=88fcfafcc539970a5a0de64d9b19dfd0
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spelling	my.utm.771352018-05-31T09:36:45Z http://eprints.utm.my/id/eprint/77135/ Co-extruded dual-layer hollow fiber with different electrolyte structure for a high temperature micro-tubular solid oxide fuel cell Ahmad, S. H. Jamil, S. M. Othman, M. H. D. Rahman, M. A. Jaafar, J. Ismail, A. F. TP Chemical technology In this study, the phase inversion-based co-extrusion method was employed to fabricate a structural-improved electrolyte/anode dual-layer hollow fiber (HF) precursor, which was then co-sintered at 1450ï¿½ï¿½C. The electrolyte structures were thoroughly investigated by varying the loading of electrolyte material (i.e. Yttria-stabilized zirconia, YSZ) with differing particle sizes (i.e. micron, sub-micron, and nano-sized) during suspension preparation. The results showed that the most promising electrolyte layer with thin, dense, gas-tight, and defect-free properties was obtained by mixing 70% submicron-YSZ and 30% nano-YSZ in electrolyte suspension (E-0.7sub0.3nano). This electrolyte formulation co-extruded with a thick nickel-oxide-YSZ (NiO-YSZ) anode layer yielded the highest bending strength of 85ï¿½MPa, providing major mechanical strength to the HF. Besides that, the nitrogen permeability value at 2.87ï¿½× 10−6ï¿½molï¿½m−2ï¿½s−1ï¿½Pa−1 suggested that the electrolyte was gas-tight, preventing fuel and oxidant transport. The fiber was then reduced to nickel (Ni)-cermet anode. It was developed to be a complete micro-tubular solid oxide fuel cell (MT-SOFC) by depositing the lanthanum strontium cobalt ferrite (LSCF)/YSZ cathode via brush painting on the dual-layer HF. The cell was fed with hydrogen gas and yielded an open-circuit voltage (OCV) as high as 1.06ï¿½V with maximum power density of 0.243ï¿½Wï¿½cm−2, at 875ï¿½ï¿½C. Based on this test, it was found that the electrolyte structural-modified dual-layer hollow fiber-based MT-SOFC using mixed particle sizes may result in a promising OCV. However, the relatively low value for power density may be due to a less porous anode; thus, improvements in the anode's structure are required in future research. Elsevier Ltd 2017 Article PeerReviewed Ahmad, S. H. and Jamil, S. M. and Othman, M. H. D. and Rahman, M. A. and Jaafar, J. and Ismail, A. F. (2017) Co-extruded dual-layer hollow fiber with different electrolyte structure for a high temperature micro-tubular solid oxide fuel cell. International Journal of Hydrogen Energy, 42 (14). pp. 9116-9124. ISSN 0360-3199 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85006713538&doi=10.1016%2fj.ijhydene.2016.06.044&partnerID=40&md5=88fcfafcc539970a5a0de64d9b19dfd0 DOI:10.1016/j.ijhydene.2016.06.044
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 Ahmad, S. H. Jamil, S. M. Othman, M. H. D. Rahman, M. A. Jaafar, J. Ismail, A. F. Co-extruded dual-layer hollow fiber with different electrolyte structure for a high temperature micro-tubular solid oxide fuel cell
description	In this study, the phase inversion-based co-extrusion method was employed to fabricate a structural-improved electrolyte/anode dual-layer hollow fiber (HF) precursor, which was then co-sintered at 1450ï¿½ï¿½C. The electrolyte structures were thoroughly investigated by varying the loading of electrolyte material (i.e. Yttria-stabilized zirconia, YSZ) with differing particle sizes (i.e. micron, sub-micron, and nano-sized) during suspension preparation. The results showed that the most promising electrolyte layer with thin, dense, gas-tight, and defect-free properties was obtained by mixing 70% submicron-YSZ and 30% nano-YSZ in electrolyte suspension (E-0.7sub0.3nano). This electrolyte formulation co-extruded with a thick nickel-oxide-YSZ (NiO-YSZ) anode layer yielded the highest bending strength of 85ï¿½MPa, providing major mechanical strength to the HF. Besides that, the nitrogen permeability value at 2.87ï¿½× 10−6ï¿½molï¿½m−2ï¿½s−1ï¿½Pa−1 suggested that the electrolyte was gas-tight, preventing fuel and oxidant transport. The fiber was then reduced to nickel (Ni)-cermet anode. It was developed to be a complete micro-tubular solid oxide fuel cell (MT-SOFC) by depositing the lanthanum strontium cobalt ferrite (LSCF)/YSZ cathode via brush painting on the dual-layer HF. The cell was fed with hydrogen gas and yielded an open-circuit voltage (OCV) as high as 1.06ï¿½V with maximum power density of 0.243ï¿½Wï¿½cm−2, at 875ï¿½ï¿½C. Based on this test, it was found that the electrolyte structural-modified dual-layer hollow fiber-based MT-SOFC using mixed particle sizes may result in a promising OCV. However, the relatively low value for power density may be due to a less porous anode; thus, improvements in the anode's structure are required in future research.
format	Article
author	Ahmad, S. H. Jamil, S. M. Othman, M. H. D. Rahman, M. A. Jaafar, J. Ismail, A. F.
author_facet	Ahmad, S. H. Jamil, S. M. Othman, M. H. D. Rahman, M. A. Jaafar, J. Ismail, A. F.
author_sort	Ahmad, S. H.
title	Co-extruded dual-layer hollow fiber with different electrolyte structure for a high temperature micro-tubular solid oxide fuel cell
title_short	Co-extruded dual-layer hollow fiber with different electrolyte structure for a high temperature micro-tubular solid oxide fuel cell
title_full	Co-extruded dual-layer hollow fiber with different electrolyte structure for a high temperature micro-tubular solid oxide fuel cell
title_fullStr	Co-extruded dual-layer hollow fiber with different electrolyte structure for a high temperature micro-tubular solid oxide fuel cell
title_full_unstemmed	Co-extruded dual-layer hollow fiber with different electrolyte structure for a high temperature micro-tubular solid oxide fuel cell
title_sort	co-extruded dual-layer hollow fiber with different electrolyte structure for a high temperature micro-tubular solid oxide fuel cell
publisher	Elsevier Ltd
publishDate	2017
url	http://eprints.utm.my/id/eprint/77135/ https://www.scopus.com/inward/record.uri?eid=2-s2.0-85006713538&doi=10.1016%2fj.ijhydene.2016.06.044&partnerID=40&md5=88fcfafcc539970a5a0de64d9b19dfd0
_version_	1643657507805069312
score	13.211869

Co-extruded dual-layer hollow fiber with different electrolyte structure for a high temperature micro-tubular solid oxide fuel cell

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