Abstract
• 0.88NN-0.12BSN ceramic possesses a desired W rec of 2.01 J/cm 3 and η of 80.3%. • 0.88NN-0.12BSN ceramic exhibits a high power density ( P D = 88.16 MW/cm 3 ). • 0.88NN-0.12BSN ceramic exhibits a large current density ( C D = 979.59 A/cm 2 ). • Energy storage properties possess excellent frequency and temperature stability. Recently, NaNbO 3 has aroused the enthusiasm of researchers due to its potential application for energy storage. In this work, lead-free (1- x )NaNbO 3 - x Bi(Sn 0.5 Ni 0.5 )O 3 ceramics or (1- x )NN- x BSN in abbreviation were prepared by the traditional solid-state reaction method. The microstructure, dielectric properties and energy storage performances of (1- x )NN- x BSN ceramics were investigated in detail. Superior breakdown strength and underdamped discharge abilities are achieved in 0.88NN-0.12BSN ceramic with a maximum recoverable energy storage density (2.01 J/cm 3 ) and high efficiency (80.3%) at 310 kV/cm. The excellent stability of energy storage properties in the frequency range from 100 Hz to 1 MHz, and the temperature range from −150 to 300 °C, are observed in the 0.88NN-0.12BSN ceramic. Furthermore, the 0.88NN-0.12BSN ceramic exhibits a large current density (~979.59 A/cm 2 ), an extremely high power density (~88.16 MW/cm 3 ) and stable discharge period of about 51 ns.
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