Dielectric capacitors are useful for their fast charge-discharge capabilities and high power density, but their efficiency, energy-storage density, and thermal stability limit their practical use.
A new approach using a high-entropy strategy was tested on a specific lead-free ceramic composition, leading to remarkable improvements in efficiency (75%) and energy-storage density (2.4 J/cm) while also achieving very high hardness (∼7.2 GPa).
The research shows that increasing configuration entropy not only enhances mechanical and energy storage properties but also improves thermal and frequency stability, paving the way for advanced capacitor design.