Significantly improved energy-storage performance of NaNbO3 lead-free ceramics with Ca0.7Bi 0.2TiO3 addition

被引：15
作者：
Liang, Cen [1 ]
Wang, Changyuan [1 ]
Zhao, Hanyu [1 ]
Cao, Wenjun [1 ]
Li, Feng [2 ]
Wang, Chunchang [1 ]
机构：
[1] Anhui Univ, Sch Mat Sci & Engn, Lab Dielect Funct Mat, Hefei 230601, Peoples R China
[2] Anhui Univ, Inst Phys Sci & Informat Technol, Informat Mat & Intelligent Sensing Lab Anhui Prov, Key Lab Struct & Funct Regulat Hybrid Mat,Minist E, Hefei 230601, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2023年 / 961卷
基金：
中国国家自然科学基金;
关键词：
Lead-free; NaNbO3; ceramics; Phase transition; Energy storage; RELAXOR ANTIFERROELECTRIC CERAMICS; DENSITY; STABILITY;
D O I：
10.1016/j.jallcom.2023.170962
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：
Dielectric energy-storage capacitors play a momentous role in pulsed systems due to their ultrahigh power density (PD), but the low energy-storage density strongly limits their application. Herein, linear dielectric material of Bi0.2Ca0.7TiO3 is added into NaNbO3 matrix to enhance relaxor behavior, improve polarization, and boost breakdown strength. The (1-x)NaNbO3-xBi0.2Ca0.7TiO3 (NN-xBCT) lead-free energy storage ceramics were designed and prepared by solid-state reaction method. A large recoverable energy-storage density (Wrec) of 4.43 J & BULL;cm-3 , a high efficiency (& eta;) of 79% at 360 kV & BULL;cm-1, a high PD of 184 MW & BULL;cm-3 and the large WD of 4.3 J & BULL;cm-3. The good temperature/frequency/fatigue stability over the range of 25-120 celcius/ 1-200 Hz/1-1000 0 cycles were achieved simultaneously in the NN-0.30BCT ceramic. Our results indicate that the NN-30BCT ceramic holds tremendous promise for energy storage applications. & COPY; 2023 Elsevier B.V. All rights reserved.
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页数：8
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