Local structural mechanism for enhanced energy storage properties in heterovalent doped NaNbO<inf>3</inf> ceramics

Htet, CS; Manjón-Sanz, AM; Liu, J; Babori, C; Barati, M; Marlton, FP; Daniel, L; Jørgensen, MRV; Pramanick, A

Local structural mechanism for enhanced energy storage properties in heterovalent doped NaNbO<inf>3</inf> ceramics

Htet, CS Manjón-Sanz, AM Liu, J Babori, C Barati, M Marlton, FP Daniel, L Jørgensen, MRV Pramanick, A

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Publisher:: ELSEVIER SCI LTD
Publication Type:: Journal Article
Citation:: Journal of the European Ceramic Society, 2024, 44, (3), pp. 1597-1609
Issue Date:: 2024-03-01

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Field	Value	Language
dc.contributor.author	Htet, CS
dc.contributor.author	Manjón-Sanz, AM
dc.contributor.author	Liu, J
dc.contributor.author	Babori, C
dc.contributor.author	Barati, M
dc.contributor.author	Marlton, FP
dc.contributor.author	Daniel, L
dc.contributor.author	Jørgensen, MRV
dc.contributor.author	Pramanick, A
dc.date.accessioned	2024-12-17T00:26:23Z
dc.date.available	2024-12-17T00:26:23Z
dc.date.issued	2024-03-01
dc.identifier.citation	Journal of the European Ceramic Society, 2024, 44, (3), pp. 1597-1609
dc.identifier.issn	0955-2219
dc.identifier.issn	1873-619X
dc.identifier.uri	http://hdl.handle.net/10453/182612
dc.description.abstract	In recent years, there is a growing interest for new lead-free oxides with reversible antiferroelectric (AFE)-ferroelectric (FE) phase transition for high-power energy-storage applications. NaNbO3-based ceramics are particularly attractive due to their easy synthesis and cost-effectiveness. In order to stabilize reversible AFE-FE phase transition, NaNbO3 is doped with a combination of heterovalent substitutions, although the underlying structural mechanism for the same is poorly understood. Here, we investigated local and average structures of Ca/Zr doped NaNbO3 using neutron total scattering. We show that Ca/Zr doping increases the average AFE phase (Pbma) fraction, however, the material remains as a composite of both FE (P21ma) and AFE regions. Analysis of local structure suggests that increase in the long-range AFE phase results from more extensive twinning of local FE regions, due to introduced charge disorder. We propose that enhanced energy-storage properties of Ca/Zr-doped NaNbO3 arises from localized twin boundary motion between the defect-induced pinning centers.
dc.language	English
dc.publisher	ELSEVIER SCI LTD
dc.relation.ispartof	Journal of the European Ceramic Society
dc.relation.isbasedon	10.1016/j.jeurceramsoc.2023.10.072
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0912 Materials Engineering
dc.subject.classification	Materials
dc.subject.classification	4016 Materials engineering
dc.title	Local structural mechanism for enhanced energy storage properties in heterovalent doped NaNbO<inf>3</inf> ceramics
dc.type	Journal Article
utslib.citation.volume	44
utslib.for	0912 Materials Engineering
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Science
pubs.organisational-group	University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	closed_access	*
dc.date.updated	2024-12-17T00:26:20Z
pubs.issue	3
pubs.publication-status	Published
pubs.volume	44
utslib.citation.issue	3

Abstract:

In recent years, there is a growing interest for new lead-free oxides with reversible antiferroelectric (AFE)-ferroelectric (FE) phase transition for high-power energy-storage applications. NaNbO3-based ceramics are particularly attractive due to their easy synthesis and cost-effectiveness. In order to stabilize reversible AFE-FE phase transition, NaNbO3 is doped with a combination of heterovalent substitutions, although the underlying structural mechanism for the same is poorly understood. Here, we investigated local and average structures of Ca/Zr doped NaNbO3 using neutron total scattering. We show that Ca/Zr doping increases the average AFE phase (Pbma) fraction, however, the material remains as a composite of both FE (P21ma) and AFE regions. Analysis of local structure suggests that increase in the long-range AFE phase results from more extensive twinning of local FE regions, due to introduced charge disorder. We propose that enhanced energy-storage properties of Ca/Zr-doped NaNbO3 arises from localized twin boundary motion between the defect-induced pinning centers.

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http://hdl.handle.net/10453/182612