Energy storage properties of composite films with relaxor antiferroelectric behaviors

Here, typical relaxor ferroelectric Ba2Bi4Ti5O18 (BBT) and antiferroelectric PbZrO3 (PZ) were selected to form BBT/PZ/BBT composite films for high energy storage performance. The composite films exhibit relaxor antiferroelectric behavior at 1000 kV/cm. A large recoverable energy storage density (W-rec) of 66.7 J/cm(3) and efficiency (eta) of 65.6% were achieved at 2500 kV/cm in BBT/PZ/BBT composite films. Additionally, the variation of W-rec and eta was less than 4% after 5 x 10(7) charge-discharge cycles at 1000 kV/cm. What's more, the energy storage performance of composite films is stable under the temperature range from 20 degrees C to 160 degrees C and frequency range from 500 Hz to 2000 Hz. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

BBT/PZ/BBT composite films based on relaxor ferroelectric and antiferroelectric materials demonstrate high energy storage performance with a large recoverable energy storage density and efficiency, as well as stable behavior under various temperature and frequency ranges.