Design of polymorphic heterogeneous shell in relaxor antiferroelectrics for ultrahigh capacitive energy storage.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39837866.
- Also identified by DOI 10.1038/s41467-025-56316-9 and PMC identifier 11751392.
- Licence recorded as CC BY-NC-ND.
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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<sup>-3</sup> 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.