Ultrahigh energy storage density and superior discharge power density in a novel antiferroelectric lead hafnate. (May 2022)

• Record Type: Journal Article
• Authors: Ge, Peng-Zu; Tang, Xin-Gui; Meng, Ke; Huang, Xian-Xiong; Liu, Qiu-Xiang; Jiang, Yan-Ping; Gong, Wei-Ping; Wang, Ting
• Is Part Of: Materials today physics. Volume 24(2022)
• Publication Date: 2022-05
• Subjects: (Pb, La)(Hf, Ti)O3 ceramic -- Antiferroelectric -- Energy storage -- Charge-discharge; Materials science -- Periodicals; Physics -- Periodicals; Electronic journals; 530.41
• DOI: 10.1016/j.mtphys.2022.100681
• Languages: English
• ISSNs: 2542-5293

Abstract

Abstract: Dielectric capacitors have been widely applied to pulse charge-discharge systems with medium energy density and high power density. In this work, (Pb1-3 x /2 La x )Hf0.96 Ti0·04 O3 (PLHT) antiferroelectric (AFE) ceramics were synthesized by a solid-state solution. The field-induced AFE to ferroelectric transitions with double polarization-electric field hysteresis loops were observed for all studied components. The energy storage efficiency of PLHT ceramics was significantly improved by doping La 3+ . The sample of x = 0.05 (PLHT-0.05) exhibits excellent energy storage properties with a record-high recoverable energy storage density of 11.2 J/cm 3, and a high energy efficiency of 88.9% achieved at an electric field of 360 kV/cm. The ceramic exhibits superior frequency and thermal stability against external environmental change. Besides, a record high discharge energy density (8.51 J/cm 3 ) with an ultrafast discharge rate ( t 0.9 <211 ns) was obtained under 360 kV/cm at room temperature in PLHT-0.05 ceramic. Underdamped discharge test shows the sample achieves an ultrahigh current density of 2098 A/cm 2 and a giant power density of 378 MW/cm 3, suggesting a significant advantage compared with the previously reported ceramic systems. The significant improvement implies the PLHT AFE ceramics can provide a realistic solution for high-power energy storage capacitors. Graphical abstract: Image 1 Highlights: Double hysteresis loops were firstly observed in AFE2 phase of PbHfO3 -based ceramic. The as-prepared ceramic possesses ultra-high W rec (11.2 J/cm 3 ) and high η (88.9%). The discharge energy density and rate ( t 0.9 ) were 8.51J/cm 3 and 211ns, respectively. The discharge current and power density were 2098A/cm 2 and 378 MW/cm 3, respectively.