Ultrahigh capacitive energy storage of BiFeO<sub>3</sub>-based ceramics through multi-oriented nanodomain construction.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 40021622.
- Also identified by DOI 10.1038/s41467-025-57228-4 and PMC identifier 11871070.
- Licence recorded as CC BY-NC-ND.
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Abstract
Lead-free BiFeO<sub>3</sub>-based (BF) materials with colossal spontaneous polarization and high Curie temperatures exhibit considerable potential for groundbreaking developments in dielectric capacitors. However, their inherent limitations, such as restricted breakdown strength (E<sub>b</sub>) and pronounced remanent polarization, critically restrict advancements in energy storage capabilities. Herein, we achieve an exceptional recoverable energy density of 12.2 J cm<sup>-3</sup> with an impressive efficiency of 90.1% via the strategic design of a dipolar region with high resilience to electric fields within BiFeO<sub>3</sub>-based ceramics. Guided by phase-field simulations and validated through atomic-scale observations, the superior energy storage performance is attributed to the incorporation of aliovalent ions, which disrupt the long-range ordered single-phase distribution, thus enhancing the disorder of polarization vectors and drastically reducing polarization hysteresis. Simultaneously, the refinement of the microstructural scale, coupled with the introduction of high-bandgap ions, synergistically improves the breakdown durability. This study provides a feasible blueprint for leveraging high-performance BiFeO<sub>3</sub>-based ceramics, which further facilitates the progress of lead-free capacitors for next-generation energy storage systems.