Remarkable energy storage performance of BiFeO3-based high-entropy lead-free ceramics and multilayers

被引:1
作者
Li, Hongtian [1 ,2 ]
Li, Xu [1 ]
Du, Yuxiao [2 ]
Chen, Xiaoxin [1 ,2 ]
Qin, Hailan [1 ,2 ]
Tabak, Yasemin [3 ]
Evcin, Atilla [4 ]
Hussain, Fayaz [5 ]
Song, Kaixin [6 ]
Zhou, Huanfu [1 ]
Zhao, Jianwei [2 ,7 ]
Wang, Dawei [2 ,8 ]
机构
[1] Guilin Univ Technol, Coll Mat Sci & Engn, Guilin 541004, Peoples R China
[2] Chinese Acad Sci, Shenzhen Inst Adv Elect Mat, Shenzhen Inst Adv Technol, Shenzhen 518055, Peoples R China
[3] TUBITAK Marmara Res Ctr, Mat Technol, TR-41470 Kocaeli, Turkiye
[4] Afyon Kocatepe Univ, Mat Sci & Engn Dept, TR-03200 Afyonkarahisar, Turkiye
[5] NED Univ Engn & Technol, Dept Mat Engn, Karachi 75270, Pakistan
[6] Hangzhou Dianzi Univ, Coll Elect Informat, Hangzhou 310018, Peoples R China
[7] Shenzhen Technol Univ, Coll New Mat & New Energies, Shenzhen 518118, Peoples R China
[8] Harbin Inst Technol, Precis Acousto opt Instrument Inst, Sch Instrumentat Sci & Engn, Harbin 150080, Peoples R China
关键词
High-entropy; BiFeO3; Lead-free; Core-shell microstructure; MLCCs; DENSITY; CAPACITORS; ORIGIN;
D O I
10.1016/j.cej.2024.156112
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Electrostatic energy storage capacitors featuring fast charge-discharge capability play an indispensable role in pulsed power capacitors. However, the inverse correlation between polarization and dielectric breakdown strength (E-b) is the main obstacle limiting the access to high recoverable energy storage density (Wrec) W rec ) and high efficiency (7). In this work, we designed a series of novel (1- x )BiFeO (3- x )(Ba (0.2) S r(0.2) Ca- 0.2 Bi (0.2) Na (0.2) )TiO (3) (BFx BSCBNT, x = 0.4-1.0) high-entropy lead-free relaxor ferroelectric ceramics. The synergy of refined grain size, broadened band gap, and core-shell microstructure is well-investigated by experimental results and phase-field simulations. High polarization difference is achieved by the strengthened relaxation behavior and the dominated polar nanoregions (PNRs). Both high W rec of 6.0 J/cm(3) and 7 of 81.1 % are achieved in the BF-0.8BSCBNT ceramics. In particular, a remarkable W rec of 12.1 J/cm3 3 with a 7 of 86.1 % are obtained in the multilayer ceramic capacitors (MLCCs) fabricated from the x = 0.8 composition. Excellent temperature stability (<4.0 % in the range of 25-140 degrees C) and frequency stability (<6.2 % in the range of 1-500 Hz) are also achieved in MLCCs. The excellent energy storage performance demonstrates that high-entropy strategy is effective to develop novel lead-fee ceramics and devices for energy storage applications.
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页数:9
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