Tailoring high-energy storage NaNbO3-based materials from antiferroelectric to relaxor states

Mao-Hua Zhang (), Hui Ding, Sonja Egert, Changhao Zhao, Lorenzo Villa, Lovro Fulanović, Pedro B. Groszewicz, Gerd Buntkowsky, Hans-Joachim Kleebe, Karsten Albe, Andreas Klein and Jurij Koruza ()
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Mao-Hua Zhang: Technical University of Darmstadt
Hui Ding: Technical University of Darmstadt
Sonja Egert: Technical University of Darmstadt
Changhao Zhao: Technical University of Darmstadt
Lorenzo Villa: Technical University of Darmstadt
Lovro Fulanović: Technical University of Darmstadt
Pedro B. Groszewicz: Delft University of Technology
Gerd Buntkowsky: Technical University of Darmstadt
Hans-Joachim Kleebe: Technical University of Darmstadt
Karsten Albe: Technical University of Darmstadt
Andreas Klein: Technical University of Darmstadt
Jurij Koruza: Technical University of Darmstadt

Nature Communications, 2023, vol. 14, issue 1, 1-11

Abstract: Abstract Reversible field-induced phase transitions define antiferroelectric perovskite oxides and lay the foundation for high-energy storage density materials, required for future green technologies. However, promising new antiferroelectrics are hampered by transition´s irreversibility and low electrical resistivity. Here, we demonstrate an approach to overcome these problems by adjusting the local structure and defect chemistry, delivering NaNbO3-based antiferroelectrics with well-defined double polarization loops. The attending reversible phase transition and structural changes at different length scales are probed by in situ high-energy X-ray diffraction, total scattering, transmission electron microcopy, and nuclear magnetic resonance spectroscopy. We show that the energy-storage density of the antiferroelectric compositions can be increased by an order of magnitude, while increasing the chemical disorder transforms the material to a relaxor state with a high energy efficiency of 90%. The results provide guidelines for efficient design of (anti-)ferroelectrics and open the way for the development of new material systems for a sustainable future.

Date: 2023
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DOI: 10.1038/s41467-023-37060-4

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