Improving energy storage performance enabled by composition-induced dielectric behavior in PbHfO3-based ceramics under low electric fields

Antiferroelectric ceramics with high energy storage performance at low electric fields appear to be particularly important to meet the requirements of miniaturized devices with a high level of integration. In this work, Ti-doped PbHfO3 antiferroelectric ceramics were fabricated via a solid-state method. The PbHf0.99Ti0.01O3 bulk ceramics exhibit excellent energy storage performance (W-rec = 5.49 J cm(-3) at 200 kV cm(-1)) and high property stability (<5% over 20 degrees C-120 degrees C and 1-100 Hz), accompanied by the stabilization of the ferroelectric state. Based on the results of XRD refinement and numerical study, we found that the enlarged displacement space of B-site cations accounts for the enhanced polarization at a low electric field. PbHf0.09Ti0.01O3 ceramics exhibited giant potential in energy storage applications at low electric fields.