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Designing Artificial Mesoscopic-Scale Heterolayers for Ultrahigh Energy Storage
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DOI：10.1002/aenm.71297.png)
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Abstract
En 中文
Conventional doping approaches in antiferroelectric (AFE) ceramics inevitably involve a trade-off between maximizing polarization (Pmax) and sustaining high breakdown strength (EB), which fundamentally limits energy storage performance. Here, we present a paradigm-shifting strategy based on the deliberate design of mesoscale heterolayers integrating antiferroelectric PbHfO3 and linear dielectric SrHfO3, effectively overcoming this long-standing challenge. Guided by phase-field simulations, we fabricate laminated ceramics with an optimally tuned fraction of the linear dielectric layer. The resulting heterostructure leverages controlled electric-field redistribution and interfacial effects, enabling synergy between the properties of the two constituents. This synergy yields a superior recoverable energy density of 23.1 J cm−3 along with a high efficiency of 83.7%, surpassing any performance achievable through a simple rule of mixtures. This heterolayer design principle establishes a general and effective route for engineering high-performance dielectric composites for advanced energy storage applications.
Keywords:
antiferroelectric trade-off
breakdown strength
domain configuration
energy storage
heterolayer design
Journal
IF:
26
Papers:
1.0W
Citations:
15.7W
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