Tunable transport property of oxygen ion in metal oxide thin film: Impact of electrolyte orientation on conductivity

Abstract Quest for efficient ion conducting electrolyte thin film operating at intermediate temperature (~600 °C) holds promise for the real-world utilization of solid oxide fuel cells. Here, we report the correlation between mixed as well as preferentially oriented samarium doped cerium oxide elect...

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Autores principales:	P. Arunkumar, R. Ramaseshan, S. Dash, K. Suresh Babu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c881d9d4d01e4235bddf8507d739993e
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spelling	oai:doaj.org-article:c881d9d4d01e4235bddf8507d739993e2021-12-02T12:30:27ZTunable transport property of oxygen ion in metal oxide thin film: Impact of electrolyte orientation on conductivity10.1038/s41598-017-03705-w2045-2322https://doaj.org/article/c881d9d4d01e4235bddf8507d739993e2017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03705-whttps://doaj.org/toc/2045-2322Abstract Quest for efficient ion conducting electrolyte thin film operating at intermediate temperature (~600 °C) holds promise for the real-world utilization of solid oxide fuel cells. Here, we report the correlation between mixed as well as preferentially oriented samarium doped cerium oxide electrolyte films fabricated by varying the substrate temperatures (100, 300 and 500 °C) over anode/ quartz by electron beam physical vapor deposition. Pole figure analysis of films deposited at 300 °C demonstrated a preferential (111) orientation in out-off plane direction, while a mixed orientation was observed at 100 and 500 °C. As per extended structural zone model, the growth mechanism of film differs with surface mobility of adatom. Preferential orientation resulted in higher ionic conductivity than the films with mixed orientation, demonstrating the role of growth on electrochemical properties. The superior ionic conductivity upon preferential orientation arises from the effective reduction of anisotropic nature and grain boundary density in highly oriented thin films in out-of-plane direction, which facilitates the hopping of oxygen ion at a lower activation energy. This unique feature of growing an oriented electrolyte over the anode material opens a new approach to solving the grain boundary limitation and makes it as a promising solution for efficient power generation.P. ArunkumarR. RamaseshanS. DashK. Suresh BabuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-18 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q P. Arunkumar R. Ramaseshan S. Dash K. Suresh Babu Tunable transport property of oxygen ion in metal oxide thin film: Impact of electrolyte orientation on conductivity
description	Abstract Quest for efficient ion conducting electrolyte thin film operating at intermediate temperature (~600 °C) holds promise for the real-world utilization of solid oxide fuel cells. Here, we report the correlation between mixed as well as preferentially oriented samarium doped cerium oxide electrolyte films fabricated by varying the substrate temperatures (100, 300 and 500 °C) over anode/ quartz by electron beam physical vapor deposition. Pole figure analysis of films deposited at 300 °C demonstrated a preferential (111) orientation in out-off plane direction, while a mixed orientation was observed at 100 and 500 °C. As per extended structural zone model, the growth mechanism of film differs with surface mobility of adatom. Preferential orientation resulted in higher ionic conductivity than the films with mixed orientation, demonstrating the role of growth on electrochemical properties. The superior ionic conductivity upon preferential orientation arises from the effective reduction of anisotropic nature and grain boundary density in highly oriented thin films in out-of-plane direction, which facilitates the hopping of oxygen ion at a lower activation energy. This unique feature of growing an oriented electrolyte over the anode material opens a new approach to solving the grain boundary limitation and makes it as a promising solution for efficient power generation.
format	article
author	P. Arunkumar R. Ramaseshan S. Dash K. Suresh Babu
author_facet	P. Arunkumar R. Ramaseshan S. Dash K. Suresh Babu
author_sort	P. Arunkumar
title	Tunable transport property of oxygen ion in metal oxide thin film: Impact of electrolyte orientation on conductivity
title_short	Tunable transport property of oxygen ion in metal oxide thin film: Impact of electrolyte orientation on conductivity
title_full	Tunable transport property of oxygen ion in metal oxide thin film: Impact of electrolyte orientation on conductivity
title_fullStr	Tunable transport property of oxygen ion in metal oxide thin film: Impact of electrolyte orientation on conductivity
title_full_unstemmed	Tunable transport property of oxygen ion in metal oxide thin film: Impact of electrolyte orientation on conductivity
title_sort	tunable transport property of oxygen ion in metal oxide thin film: impact of electrolyte orientation on conductivity
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/c881d9d4d01e4235bddf8507d739993e
work_keys_str_mv	AT parunkumar tunabletransportpropertyofoxygenioninmetaloxidethinfilmimpactofelectrolyteorientationonconductivity AT rramaseshan tunabletransportpropertyofoxygenioninmetaloxidethinfilmimpactofelectrolyteorientationonconductivity AT sdash tunabletransportpropertyofoxygenioninmetaloxidethinfilmimpactofelectrolyteorientationonconductivity AT ksureshbabu tunabletransportpropertyofoxygenioninmetaloxidethinfilmimpactofelectrolyteorientationonconductivity
_version_	1718394360802836480

Tunable transport property of oxygen ion in metal oxide thin film: Impact of electrolyte orientation on conductivity

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