Design of polymorphic heterogeneous shell in relaxor antiferroelectrics for ultrahigh capacitive energy storage

Huifen Yu, Tengfei Hu, Haoyu Wang, He Qi (), Jie Wu, Ruonan Zhang, Weisan Fang, Xiaoming Shi, Zhengqian Fu, Liang Chen () and Jun Chen
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Huifen Yu: University of Science and Technology Beijing
Tengfei Hu: Chinese Academy of Sciences
Haoyu Wang: University of Science and Technology Beijing
He Qi: University of Science and Technology Beijing
Jie Wu: Hainan University
Ruonan Zhang: University of Science and Technology Beijing
Weisan Fang: University of Science and Technology Beijing
Xiaoming Shi: University of Science and Technology Beijing
Zhengqian Fu: Chinese Academy of Sciences
Liang Chen: University of Science and Technology Beijing
Jun Chen: University of Science and Technology Beijing

Nature Communications, 2025, vol. 16, issue 1, 1-9

Abstract: Abstract Relaxor antiferroelectrics are considered promising candidate materials for achieving excellent energy storage capabilities. However, the trade-off between high recoverable energy density and high efficiency remains a major challenge in relaxor antiferroelectrics for practical applications. Herein, guided by phase-field simulation, we propose a strategy of designing polymorphic heterogeneous shell in core-shell dual-phase dielectrics to synergistically control micro and local heterostructures, resulting in comprehensive improvements in breakdown electric field, polarization fluctuation and saturation behaviors. Leveraging the core-shell effect and polarization heterogeneity, an ultrahigh recoverable energy density of 12.7 J cm-3 and an impressive efficiency of 87.2% are achieved in lead-free relaxor antiferroelectrics, making a performance breakthrough in core-shell dielectrics. This work opens up a new avenue to efficiently develop high-performance energy storage dielectrics and is expected to be popularized in other fields.

Date: 2025
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DOI: 10.1038/s41467-025-56316-9

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