文献类型：期刊文献

英文题名：Rational Co-Doping of SrZrO3 and BaTiO3 in Bi0.5Na0.5TiO3 for Extraordinary Energy Storage and Electrocaloric Performances

作者：Hou, Ying[1];Li, Jiacheng[1];Zheng, Zhigang[1];Ye, Tingting[2];Ding, Junfeng[2]

机构：[1]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China

年份：2022

卷号：5

期号：3

起止页码：3477

外文期刊名：ACS APPLIED ENERGY MATERIALS

收录：;EI(收录号：20220911724566);WOS:【SCI-EXPANDED(收录号:WOS:000813011100001)】；

基金：The authors acknowledge the financial support by National Natural Science Foundation of China (grant no. 91963116), Natural Science Foundation of Shanghai (grant no. 19ZR1411900), and the opening project of Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences (grant no. 2018KLMP01).

语种：英文

外文关键词：energy storage; electrocaloric e ff ect; multifunctionality; (Bi; Na)TiO 3; ternary system

摘要：The modification of the microstructure and electrical behaviors, through rational designing the composition of codopants (SrZrO3 and BaTiO3) in a modified Bi0.5Na0.5TiO3-based ternary system, has been systematically investigated. The extraordinary and controllable energy storage (maximum Wrec 1.15 J/cm3 and Wrec/Delta E x 100% 1.92% J/(kV cm2)) and electrocaloric (the maximum |Delta T| 2.13 K and the electrocaloric coefficient |Delta T|/Delta E 0.36 x 10-6 K m/V) performances can be integrated into this system, which are higher than those of other Bi0.5Na0.5TiO3-based systems reported previously. Meanwhile, this ternary system shows good thermal stability over a wide temperature range from room temperature to 120 degrees C. It is found that the coexistence and competition of linearly dielectric SrZrO3 and ferroelectric BaTiO3 deliver the doping evolution of polar nanoregions and obviously reduce the remnant polarization as well as the coercive field, resulting in enhanced energy storage and electrocaloric responses. These findings make Bi0.5Na0.5TiO3-BaTiO3-SrZrO3 (BNT-BT-SZ) ceramics very promising candidates as multifunctional materials.