Giant energy storage density in Ba, La co-doped PbHfO3-based antiferroelectric ceramics by a rolling process

Abstract Near-zero remanent polarization, high breakdown electric field, high saturation polarization and low electrical hysteresis are necessary conditions for antiferroelectric ceramics to obtain excellent energy storage performance. Here, Pb0.925BaxLa0.075−x(Hf0.6Sn0.4)0.98125+x/4O3 lead-based antiferroelectric ceramics were prepared by a rolling process. The composition modulations of Ba and La are beneficial to adjust the phase switching field, improve the saturation polarization and reduce the electrical hysteresis, leading to an enhanced energy storage performance. Simultaneously, the Pb0.925Ba0.045La0.03(Hf0.6Sn0.4)0.9925O3 ceramic exhibited a high energy storage density of 7.3 J cm−3 and an energy storage efficiency of 91%, revealing that this composition is an outstanding candidate in pulsed energy storage application and lays a foundation for further study on the energy storage performances of PbHfO3-based antiferroelectric ceramics.