Issue 45, 2022

A room-temperature antiferroelectric in hybrid perovskite enables highly efficient energy storage at low electric fields

Abstract

Molecular antiferroelectrics (AFEs) have taken a booming position in the miniaturization of energy storage devices due to their low critical electric fields. However, regarding intrinsic competitions between dipolar interaction and steric hindrance, it is a challenge to exploit room-temperature molecular AFEs with high energy storage efficiency. Here, we present a new 2D hybrid perovskite-type AFE, (i-BA)2(FA)Pb2Br7 (1), which shows ultrahigh energy storage efficiencies at room temperature. Most strikingly, the typical double PE hysteresis loops afford an ultrahigh storage efficiency up to ∼91% at low critical electric fields (Ecr = 41 kV cm−1); this Ecr value is much lower than those of state-of-the-art AFE oxides, revealing the potential of 1 for miniaturized energy-storage devices. In terms of the energy storage mechanism, the dynamic ordering and antiparallel reorientation of organic cations trigger its AFE-type phase transition at 303 K, thus giving a large spontaneous electric polarization of ∼3.7 μC cm−2, while the increasement of steric hindrance of the organic branched-chain i-BA+ spacer cations stabilizes its antipolar sublattices. To the best of our knowledge, this exploration of achieving ultrahigh energy storage efficiency at such a low critical electric field is unprecedented in the AFE family, which paves a pathway for miniaturized energy storage applications.

Graphical abstract: A room-temperature antiferroelectric in hybrid perovskite enables highly efficient energy storage at low electric fields

Supplementary files

Article information

Article type
Edge Article
Submitted
22 Sep 2022
Accepted
27 Oct 2022
First published
28 Oct 2022
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY license

Chem. Sci., 2022,13, 13499-13506

A room-temperature antiferroelectric in hybrid perovskite enables highly efficient energy storage at low electric fields

Y. Liu, H. Xu, X. Liu, S. Han, W. Guo, Y. Ma, Q. Fan, X. Hu, Z. Sun and J. Luo, Chem. Sci., 2022, 13, 13499 DOI: 10.1039/D2SC05285G

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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