Abstract
In this work, an outstanding recoverable energy density (2.88 J/cm3) was achieved under a low field of 150 kV/cm by introducing 4.0 mol.% NaTaO3(NT) into 0.76 K0.5Bi0.5TiO3-0.24BiFeO3 (abbreviating as 4NT), which is fabricated by the conventional solid oxide reaction route. Introduction of NT enhances the relaxor behavior, and favors the temperature insensitivity of energy storage performance. Furthermore, the polarization contribution coming from the remanent ferroelectric order makes the 4NT sample show excellent recoverable energy density. Our findings provide the promising perspective of K0.5Bi0.5TiO3-based ceramics in dielectric energy storage application.
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