Improving the Energy Storage Performance of Barium Titanate-Based Ceramics through the Addition of ZnO-Bi[sub.2]O[sub.3]-SiO[sub.2] Glass

Lead-free ceramics with excellent energy storage performance are important for high-power energy storage devices. In this study, 0.9BaTiO[sub.3]-0.1Bi(Mg[sub.2/3]Nb[sub.1/3])O[sub.3] (BT-BMN) ceramics with x wt% ZnO-Bi[sub.2]O[sub.3]-SiO[sub.2] (ZBS) (x = 2, 4, 6, 8, 10) glass additives were fabricated using the solid-state reaction method. X-ray diffraction (XRD) analysis revealed that the ZBS glass-added ceramics exhibited a perovskite structure, with the maximum relative density achieved at x = 6. The average grain size reduced obviously as the glass additive wt% increased. Also, the dielectric constant decreased and the breakdown strength increased with increases in the glass additives. The optimal energy storage density of 1.39 J/cm[sup.3] with an energy storage efficiency of 78.3% was obtained at x = 6 due to high maximum polarization and enhanced breakdown strength. The results demonstrate that this material is a potential candidate for high-pulse-power energy storage devices.