Achieving high energy efficiency and energy density in PbHfO3-based antiferroelectric ceramics†
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Abstract
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)0.995O3 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 Wrec = 7.63 J cm−3, η = 94% at an electric field of 380 kV cm−1) with excellent thermal stability (20–120 °C) were achieved in Pb0.98La0.02(Hf0.45Sn0.55)0.995O3 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.
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