Relaxation antiferroelectric energy storage

Are antiferroelectric relaxors effective in energy storage?

Antiferroelectric relaxors (AFR) have attracted increasing attention for their potential to achieve large energy storage density and high efficiency simultaneously. However, the underlying mechanism behind their superior energy storage performance remains unclear.

Can antiferroelectric ceramics improve energy storage properties?

The development of environmentally friendly energy storage dielectrics with high energy storage density has attracted increasing attention in power electronics. The combination of antiferroelectric ceramics with relaxor characteristics proves to be an efficient way to greatly improve energy storage properties.

Why does AFR show more energy storage density than ferroelectric relaxors?

In addition, it is found that AFR shows larger energy storage density as compared to ferroelectric relaxors (FR) due to the additional force from the gradient energy stabilizing antiparallel polarization alignment inherent in AFR, which make the polarization saturation later and depolarization initiation earlier.

What are relaxor anti-ferroelectrics (Rafe) dielectrics?

With this purpose, the relaxor anti-ferroelectrics (RAFE) dielectrics have been developed recently by introducing a relaxor compound into antiferroelectrics . For instance, Li obtained giant Wrec (∼7.01 J/cm 3) and η (∼77 %) in RAFE ceramics by introducing La2 O 3 into the ant-ferroelectric AgNbO 3 .

Can a relaxor/antiferroelectric composite improve the energy storage performance of lead-free ceramics?

Furthermore, the newly developed composites exhibit better energy storage characteristics at 120 °C, with a high Wrec of 3.5 J cm −3 as well as a high η of 91%. This study demonstrates that the design of a relaxor/antiferroelectric composite provides a highly effective method to improve the energy storage performance of lead-free ceramics.

Can AFE materials be tuned to antiferroelectric relaxors?

Indeed, previous experimental studies have shown that AFE materials can also be tuned to antiferroelectric relaxors (AFR) through point defect doping and the energy storage density as well as the efficiency of AFR is greatly enhanced as compared to AFE materials [, , ].