High energy storage performance of KNN-based relaxor ferroelectrics in multiphase-coexisted superparaelectric state

被引：4

作者：

Zha, Jielin ^{[1
,2
]}

Yang, Yulong ^{[1
,2
]}

Liu, Jiaxun ^{[1
,2
]}

Lu, Xiaomei ^{[1
,2
,3
]}

Hu, Xueli ^{[1
,2
]}

Yan, Shuo ^{[1
,2
]}

Wu, Zijing ^{[1
,2
]}

Zhou, Min ^{[4
]}

Huang, Fengzhen ^{[1
,2
,3
]}

Ying, Xuenong ^{[1
,2
,3
]}

Zhu, Jinsong ^{[1
,2
,3
]}

机构：

[1] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China

[2] Nanjing Univ, Phys Sch, Nanjing 210093, Peoples R China

[3] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China

[4] Xian Polytech Univ, Sch Sci, Xian 710048, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2024年 / 136卷 / 07期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

LEAD-FREE CERAMICS; ANTIFERROELECTRIC CERAMICS; DIELECTRIC-RELAXATION; GRAIN-SIZE; DENSITY; SUBSTITUTION; MORPHOLOGY; STABILITY; POLYMER;

D O I：

10.1063/5.0220887

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Although K0.5Na0.5NbO3 (KNN) possesses large maximum polarization and relatively high breakdown strength, the large remnant polarization constrains their practical applications as energy storage materials. In this work, through multi-element doping, (K0.5-0.5xNa0.5-0.5xBix)(Nb1-xSn0.2xZn0.6xTa0.2x)O-3 relaxor ferroelectrics were prepared. As the superparaelectric states (SPE) were adjusted to room temperature, orthorhombic, tetragonal, and cubic phases coexisted, accompanied by the highly dynamic polar nanoregions (PNRs). In particular, a high recoverable energy storage density of 4.5 J/cm(3) and an energy storage efficiency of 83% were achieved for the x = 0.125 ceramic, with the variations less than 11% and 4%, respectively, in the wide temperature range of 20-180 degrees C. These results demonstrate that the multiphase PNRs in the SPE state is an effective strategy for improving the energy storage performance of KNN-based ceramics.

引用

页数：10

共 57 条

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