Abstract
Dielectric energy storage materials have a high power density, which has attracted much attention in many fields, such as pulsed power generation and electric vehicles etc. As a typical and traditional energy storage material, barium strontium titanate (Ba1-xSrxTiO3) has been widely used in this field. However, its energy storage density is extremely low. In this work, (1-x)Ba0.4Sr0.6TiO3-xBiFeO3 ceramics (x = 0.05, 0.10, 0.25) were prepared by the traditional solid-state method. The results show that the energy storage density of the 0.90Ba0.4Sr0.6TiO3-0.10BiFeO3 ceramic with average grain size of 1.5 μm is 3.1 J/cm3, and the efficiency is 74.1% at a low electric field of 240 kV/cm. In addition, the energy storage density of the 0.95Ba0.4Sr0.6TiO3-0.05BiFeO3 ceramic can be as high as 3.29 J/cm3. The energy storage efficiency can reach 90.69% in the electric field of 300 kV/cm. It can be concluded that the addition of BiFeO3 can greatly enhance the energy storage property of Ba0.4Sr0.6TiO3, which indicates that Ba1-xSrxTiO3 ceramics with BiFeO3 will be good candidates in the field of power electronics.
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