AI Article Synopsis
- Electrostatic dielectric capacitors are crucial in modern electronics due to their rapid charging and high power density, but increasing their energy density presents a challenge for miniaturized applications.
- A new BiTiO-based dielectric film with high atomic configurational entropy achieved an impressive energy density of 182 J/cm² and 78% efficiency at a strong electric field (6.35 MV/cm).
- This high-entropy method improves microstructural properties, which enhances breakdown strength and reduces issues with polarization switching, ultimately boosting energy storage capabilities.
Article Abstract
Electrostatic dielectric capacitors are essential components in advanced electronic and electrical power systems due to their ultrafast charging/discharging speed and high power density. A major challenge, however, is how to improve their energy densities to effectuate the next-generation applications that demand miniaturization and integration. Here, we report a high-entropy stabilized BiTiO-based dielectric film that exhibits an energy density as high as 182 J cm with an efficiency of 78% at an electric field of 6.35 MV cm. Our results reveal that regulating the atomic configurational entropy introduces favourable and stable microstructural features, including lattice distorted nano-crystalline grains and a disordered amorphous-like phase, which enhances the breakdown strength and reduces the polarization switching hysteresis, thus synergistically contributing to the energy storage performance. This high-entropy approach is expected to be widely applicable for the development of high-performance dielectrics.
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| http://dx.doi.org/10.1038/s41563-022-01274-6 | DOI Listing |
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