Superior Energy‐Storage Capacitors with Simultaneously Giant Energy Density and Efficiency Using Nanodomain Engineered BiFeO 3 ‐BaTiO 3 ‐NaNbO 3 Lead‐Free Bulk Ferroelectrics
Hefei University of Technology
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Abstract
Abstract Dielectric capacitors are receiving a great deal of attention for advanced pulsed power owing to their high power density and quick charge/discharge rate. However, the energy density is limited and the efficiency and the thermal stability are also not ideal, which has been a longstanding obstacle to developing desirable dielectric materials. These concerns have are addressed herein by fabricating nanodomain‐engineered BiFeO 3 ‐BaTiO 3 ‐NaNbO 3 bulk ferroelectrics, integrating a high‐spontaneous‐polarization gene, wide band gaps, and a heterogeneous nanodomain structure, generating record‐excellent comprehensive performance of giant energy‐storage density W rec ≈8.12 J cm −3 , high efficiency η ≈90%…
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Authors
4Topics & keywords
Topics
Keywords
- Materials science
- Capacitor
- Dielectric
- Optoelectronics
- Energy storage
- Power density
- Thermal stability
- Voltage
UN Sustainable Development Goals
- Affordable and clean energy
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