High Energy Storage Properties of (Zn1/3nb2/3)4+ Complex-Ion Modified (Ba0.85ca0.15)(Zr0.10ti0.90)O3 Ceramics

Abstract

In this study, (Ba 0.85 Ca 0.15 )(Zr 0.10 Ti 0.90 ) 1- x (Zn 1/3 Nb 2/3 ) x O 3 ceramics, abbreviated as BCZT- x ZN (with x = 0.0, 0.1, 0.2, 0.3, 0.4) were prepared via a solid-state reaction method. The microstructure, dielectric properties, ferroelectric properties and energy storage properties were systematically investigated. SEM results showed that the average particle size decreased significantly with the increase of ZN complex-ion. The dielectric properties show that with the addition of ZN complex-ion, the dielectric constant decreases and the Curie temperature decreases below room temperature. At the same time, we observed that the ceramic exhibited good stability to temperature (-150-200°C) and frequency (10 2 -10 6 Hz) variations. The addition of ZN complex-ion can significantly reduce the residual polarization and improve the breakdown strength of ceramics. When x =0.3, The maximum energy storage density of ceramics is 0.994 J/cm 3 , which is improved by about 4 times as compared with that of the pure BCZT ceramic (0.25J/cm 3 ). These findings provide a potential pathway to enhance energy storage properties of BCZT ceramics in order to promote its energy storage application in practice.

Keywords: Lead free BCZT Dielectric properties Complex-ion Energy storage