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• W4306957251 endingPage "101185" @default.
• W4306957251 startingPage "101185" @default.
• W4306957251 abstract "As one of the most popular lead-free energy storage materials, K 0.5 Na 0.5 NbO 3 (KNN)-based ceramics are expected to replace lead-based ceramics and are widely used in energy storage field due to their high dielectric constant, high Curie temperature and environmentally friendly. However, the high remnant polarization ( P r ) and low breakdown strength (BDS) of KNN ceramic lead to its low energy storage properties, which limits its applications in energy storage field. In this work, the energy storage properties of KNN ceramic were improved by reducing average grain sizes and enhancing relaxor behavior. The 0.85K 0.5 Na 0.5 NbO 3 -0.15Bi(Mg 0.5 Zr 0.5 )O 3 (0.85KNN-0.15BMZ) ceramic prepared by the solid state method not only had high recoverable energy storage density value ( W rec ) of 3.47 J·cm -3 , but also had high energy storage efficiency value ( η ) of 89.14% at a high applied electric field of 320 kV·cm -1 . In addition, the W rec and η of 0.85KNN-0.15BMZ ceramic fluctuated slightly over the whole temperature range of 20-120 °C at 200 kV·cm -1 , showing excellent temperature stability. At the same time, it can be concluded by first-order reversal curve (FORC) distribution that 0.85KNN-0.15BMZ ceramic had excellent energy storage properties due to their enhanced relaxor behavior. In summary, the 0.85KNN-0.15BMZ ceramic can be used as the novel dielectric capacitor materials. • The multi-scale optimization strategy can serve as a paradigm. • A giant W rec of 3.47 J·cm -3 and a high η of 89.14% can be achieved. • The high temperature stability of 0.85KNN-0.15BMZ ceramic broadens its applications." @default.
• W4306957251 created "2022-10-21" @default.
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• W4306957251 date "2022-12-01" @default.
• W4306957251 modified "2023-10-17" @default.
• W4306957251 title "Enhancement of recoverable energy density and efficiency of K0.5Na0.5NbO3 ceramic modified by Bi(Mg0.5Zr0.5)O3" @default.
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• W4306957251 doi "https://doi.org/10.1016/j.mtener.2022.101185" @default.
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