Achieving high energy storage performance in PbHfO 3-based antiferroelectric ceramics by Sr element doping

被引：7
作者：
Li, Yufan [1 ]
Hu, Tengfei [2 ,3 ]
Chen, Xuefeng [2 ]
Xie, Jianjun [1 ]
Shi, Ying [1 ]
机构：
[1] Shanghai Univ, Sch Mat Sci & Engn, Shanghai 200444, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Inorgan Funct Mat & Devices, Shanghai 200050, Peoples R China
[3] Univ Chinese Acad Sci, Hangzhou Inst Adv Study, Sch Chem & Mat Sci, 1 Sub Lane Xiangshan, Hangzhou 310024, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2024年 / 994卷
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Antiferroelectric; Lead hafniate; Energy storage; Modulation period; DENSITY; EFFICIENCY;
D O I：
10.1016/j.jallcom.2024.174651
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Antiferroelectric (AFE) ceramics are the most promising material system for energy storage in dielectric capacitors due to their fast charging -discharging rate, good chemical stability, and high energy storage density. However, it is exceedingly challenging to simultaneously achieve the excellent recoverable energy density ( W re ) and high energy storage efficiency ( eta ) at present. In this work, (Pb 0.925-x Sr x La 0.05 )(Hf 0.95 Ti 0.05 )O 3 AFE ceramics with various Sr contents are fabricated by solid-state sintering processing. It has been found that Sr -doping in the A -site can significantly affect the microstructure, including reducing grain size and modulation period, effectively strengthening the antiferroelectricity, which is responsible for the improved energy storage performance. The high recoverable energy storage density of 10.2 J/cm 3 is obtained at 560 kV/cm with an ultra -high efficiency of 93.0% in (Pb 0.875 Sr 0.05 La 0.05 )(Hf 0.95 Ti 0.05 )O 3 ceramics. These features suggest that Sr -doped PbHfO 3 -based AFE ceramics can serve as promising candidates for capacitor materials, offering significant potential in the realm of energy storage applications.
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页数：9
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