Dielectric ceramic capacitors are prospective energy-storage devices for pulsed-power systems owing to their ultrafast charge-discharge speed. However, low energy-storage density makes them difficult to commercialize for high-pulse-power technology applications. Herein, we presented a structurally regulated design strategy to disrupt a long-range ferroelectric order, refined grains, and eventually achieve excellent comprehensive energy-storage performance in (1 - ) (0.7BiNaTiO-0.3SrTiO)- Sm(ZnNb)O eco-friendly ceramics. A large of ∼7.43 ± 0.05 J/cm and a high η of ∼85 ± 0.5% of 0.96 (0.7BiNaTiO-0.3SrTiO)-0.04 Sm(ZnNb)O were obtained at a low electric field of 290 kV cm with good energy-storage temperature (25-120 °C), frequency (1-100 Hz) stability, and charge-discharge properties ( ∼ 74 ± 1 MW/cm and τ ∼ 159 ± 2 ns). This strategy inspires rational structurally regulated designs and aims to promote the development of eco-friendly 0.7BiNaTiO-based ceramics with excellent energy-storage characteristics.
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