Exploring novel bismuth-based materials for energy storage applications

Abstract

A novel bismuth-based material of hot-pressed (Bi0.5K0.5)TiO3–0.06La(Mg0.5Ti0.5)O3 ceramic with an ultrahigh energy storage density and fast discharge speed.

Ultrahigh Energy‐Storage Density in NaNbO3‐Based Lead‐Free Relaxor Antiferroelectric Ceramics with Nanoscale Domains

“…Nevertheless, ultrahigh W rec ≈ 12.2 J cm −3 and satisfied energy efficiency of η ≈ 69% can be obtained simultaneously under an external electric field of ≈68 kV mm −1 for samples with a thickness of 0.15 mm. The comparisons of the maximum W rec values and corresponding η values, together with their test electric fields ( E test ) for recently reported bulk dielectric ceramics, are given in Figure c . It can be clearly seen that the studied material in this research shows the highest W rec ≈ 12.2 J cm −3 in both lead‐free and lead‐based perovskite bulk ceramic systems.…”

“…In addition, extremely large phase switching current and large volume change are involved during loading/unloading, which tend to electrically and mechanically degrade the energy‐storage performance . Generally, a slim hysteresis loop with low energy dissipation can be achieved by tailoring the domain size into micrometer (Figure b) or nanometer (Figure c) scales in either FEs or AFEs . The relaxor FEs with polar nanoregions exhibit hysteresis‐free polarization response and require extremely high external electric field to construct a saturated long‐range ordered FE state owing to the existence of local random fields .…”

Ultrahigh Energy‐Storage Density in Antiferroelectric Ceramics with Field‐Induced Multiphase Transitions

“…As an electric energy‐storage method, ceramic‐based dielectric capacitors are the heart components storing energy under electrostatic field in power electronic devices . Extensive efforts have been devoted to enhance the energy‐storage performance of dielectric ceramics in order to meet the increasing demands of charge‐storage capacitors . It is known that antiferroelectric (AFE) materials are one of the most studied dielectrics for energy‐storage applications, possessing unique polarization behavior from their counterparts, such as ferroelectric (FE) and linear dielectric materials.…”

Recent progress of ecofriendly perovskite-type dielectric ceramics for energy storage applications

“…6). 57 Large coercive electric field and conductivity and low piezoelectric properties impede their further applications. It is well known that constructing morphotropic phase boundaries (MPB) is believed an efficient method for improving electromechanical properties because of the facilitation of domain rotations and rotations.…”