Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Local structural mechanism for enhanced energy storage properties in heterovalent doped NaNbO3 ceramics

Htet, Cho Sandar ; Manjón-Sanz, Alicia Maria ; Liu, Jue ; Babori, Chaimae ; Barati, Mahmoud ; Marlton, Frederick P. ; Daniel, Laurent ; Jørgensen, Mads Ry Vogel LU orcid and Pramanick, Abhijit (2024) In Journal of the European Ceramic Society 44(3). p.1597-1609
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... (More)

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.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Antiferroelectric/ferroelectric, Neutron scattering, Pair distribution function, Phase transition
in
Journal of the European Ceramic Society
volume
44
issue
3
pages
1597 - 1609
publisher
Elsevier
external identifiers
  • scopus:85175642369
ISSN
0955-2219
DOI
10.1016/j.jeurceramsoc.2023.10.072
language
English
LU publication?
yes
id
052d61ec-77f1-46ba-a6ec-2f79924c1a45
date added to LUP
2023-12-04 12:46:25
date last changed
2024-01-09 15:44:51
@article{052d61ec-77f1-46ba-a6ec-2f79924c1a45,
  abstract     = {{<p>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. NaNbO<sub>3</sub>-based ceramics are particularly attractive due to their easy synthesis and cost-effectiveness. In order to stabilize reversible AFE-FE phase transition, NaNbO<sub>3</sub> 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 NaNbO<sub>3</sub> 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 (P2<sub>1</sub>ma) 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 NaNbO<sub>3</sub> arises from localized twin boundary motion between the defect-induced pinning centers.</p>}},
  author       = {{Htet, Cho Sandar and Manjón-Sanz, Alicia Maria and Liu, Jue and Babori, Chaimae and Barati, Mahmoud and Marlton, Frederick P. and Daniel, Laurent and Jørgensen, Mads Ry Vogel and Pramanick, Abhijit}},
  issn         = {{0955-2219}},
  keywords     = {{Antiferroelectric/ferroelectric; Neutron scattering; Pair distribution function; Phase transition}},
  language     = {{eng}},
  number       = {{3}},
  pages        = {{1597--1609}},
  publisher    = {{Elsevier}},
  series       = {{Journal of the European Ceramic Society}},
  title        = {{Local structural mechanism for enhanced energy storage properties in heterovalent doped NaNbO<sub>3</sub> ceramics}},
  url          = {{http://dx.doi.org/10.1016/j.jeurceramsoc.2023.10.072}},
  doi          = {{10.1016/j.jeurceramsoc.2023.10.072}},
  volume       = {{44}},
  year         = {{2024}},
}