Achieving high energy efficiency and energy density in PbHfO3-based antiferroelectric ceramics

Antiferroelectric materials with higher electric field, reduced energy dissipation and lower remanent polarization generally display excellent energy storage performance. In this work, Pb0.98La0.02(HfxSn1-x)(0.995)O-3 lead-based antiferroelectric ceramics were synthesized by a rolling process. It is revealed that the inhomogeneous distribution of Sn4+ can disorder the local structure, which is responsible for the slim hysteresis loops. Superior energy storage performance (recoverable energy density W-rec = 7.63 J cm(-3), eta = 94% at an electric field of 380 kV cm(-1)) with excellent thermal stability (20-120 degrees C) were achieved in Pb0.98La0.02(Hf0.45Sn0.55)(0.995)O-3 ceramic. In addition, it also shows a notable discharge current density of 1430 A cm(-2) and high level of power density of 193 MW cm(-3) with a fast discharge speed (112 ns discharge period), which greatly promote the application of this series of component materials in energy storage applications.