A high-temperature double perovskite molecule-based antiferroelectric with excellent anti-breakdown capacity for energy storage

Yi Liu, Yu Ma, Xi Zeng, Haojie Xu, Wuqian Guo, Beibei Wang, Lina Hua, Liwei Tang, Junhua Luo () and Zhihua Sun ()
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Yi Liu: Chinese Academy of Sciences
Yu Ma: Chinese Academy of Sciences
Xi Zeng: Chinese Academy of Sciences
Haojie Xu: Chinese Academy of Sciences
Wuqian Guo: Chinese Academy of Sciences
Beibei Wang: Chinese Academy of Sciences
Lina Hua: Chinese Academy of Sciences
Liwei Tang: Chinese Academy of Sciences
Junhua Luo: Chinese Academy of Sciences
Zhihua Sun: Chinese Academy of Sciences

Nature Communications, 2023, vol. 14, issue 1, 1-9

Abstract: Abstract Halide double perovskites have recently emerged as an environmentally green candidate toward electronic and optoelectronic applications owing to their non-toxicity and versatile physical merits, whereas study on high-temperature antiferroelectric (AFE) with excellent anti-breakdown property remains a huge blank in this booming family. Herein, we present the first high-temperature AFE of the lead-free halide double perovskites, (CHMA)2CsAgBiBr7 (1, where CHMA+ is cyclohexylmethylammonium), by incorporating a flexible organic spacer cation. The typical double P-E hysteresis loops and J-E curves reveal its concrete high-temperature AFE behaviors, giving large polarizations of ~4.2 μC/cm2 and a high Curie temperature of 378 K. Such merits are on the highest level of molecular AFE materials. Particularly, the dynamic motional ordering of CHMA+ cation contributes to the formation of antipolar alignment and high electric breakdown field strength up to ~205 kV/cm with fatigue endurance over 104 cycles, almost outperforming the vast majority of molecule counterparts. This is the first demonstration of high-temperature AFE properties in the halide double perovskites, which will promote the exploration of new “green” candidates for anti-breakdown energy storage capacitor.

Date: 2023
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DOI: 10.1038/s41467-023-38007-5

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