Flexible antiferroelectric thick film deposited on nickel foils for high energy‐storage capacitor

Abstract

Flexible antiferroelectric (AFE) Pb0.94La0.04Zr0.97Ti0.03O3 (PLZT) thick‐film capacitors were fabricated on nickel foil substrates using sol‐gel method. The thick PLZT film shows pure perovskite phase with dense microstructure. The discharge energy‐storage properties of the thick PLZT film are directly evaluated by the resistance‐inductance‐capacitance (RLC) circuit. The maximum value of the discharge energy‐storage density (Wdis) is 15.8 J/cm3 at 1400 kV/cm and 90% of the corresponding energy is released in a short time of about 250 ns. In addition, the Wdis and discharge time could be adjusted by the bent radius of the film, which provides a simple and feasible solution for the regulation of the electrical performance. Furthermore, the flexible AFE film exhibits good mechanical properties under cycling tests with bending radii down to 2.5 mm and 1500 rounds. This work shows a critical significance in fabricating flexible AFE capacitors for application in modern electronics and electrical power systems.

Achieving ultrahigh energy-storage capability in PbZrO3-based antiferroelectric capacitors based on optimization of property parameters

“…In fact, energy density calculated through the integral of P-E loops with a period of milliseconds is considered as a theoretical result. 63 Differently, the resistance-inductance-capacitance (RLC) circuit is oen used to judge the actual discharge process of dielectric capacitors due to fast discharge speed in microseconds, even nanoseconds. 49,64 Thus, pulsed discharge measurements of the PLSZT5 ceramic under different conditions were conducted to further evaluate the energy-storage capability in actual applications.…”

High Energy Storage Performance of All-Inorganic Flexible Antiferroelectric–Insulator Multilayered Thin Films

“…According to the previous studies, some effective methods have been proposed for obtaining the flexible inorganic films. (1) Thin films are deposited on a substrate of the flexible metal foil . However, the metal ions and ferroelectric thin films are interdiffused during the annealing and crystallization process under a high-temperature, resulting in the increasing of leakage current density and the degraded insulating performance of films.…”

Thermodynamic Analysis of Stress‐Mediated Barocaloric Effect, Electrocaloric Effect, and Energy Storage of PbZrO3 Antiferroelectric Film

“…[ 21,22 ] Therefore, AFE films will exhibit a distinctly different stress‐induced polarization, and related thermal and electrical properties. [ 23–26 ] Up to now, these aspects still remain less understood, whether in theory or experiment.…”