文献类型：期刊文献

英文题名：Effect of Mn/Nb heterovalent substitution on the electrocaloric response and energy storage performance of Ba(Sn, Ti)O3 relaxor-ferroelectrics

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

机构：[1]East China Univ Sci & Technol, Dept 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：2021

卷号：46

期号：4

起止页码：141

外文期刊名：JOURNAL OF ELECTROCERAMICS

收录：;EI(收录号：20212910661853);WOS:【SCI-EXPANDED(收录号:WOS:000673187700001)】；

基金：The authors acknowledge the financial support by National Natural Science Foundation of China (Grant No. 91963116), by Natural Science Foundation of Shanghai (Grant No. 19ZR1411900), by the opening project of Key Laboratory of Inorganic Functional Materials and Devices, Chinese Academy of Sciences (Grant No. KLIFMD201707), and by 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：Electrocaloric; Energy storage; Relaxor ferroelectrics; Heterovalent doping

摘要：Electrocaloric (EC) refrigeration, is accepted as an auspicious method to develop eco-friendly cooling devices. Here, the investigations on the EC response and energy storage performance of heterovalent-doped Ba(Sn, Ti)O-3 relaxor ferroelectrics are carried out. Doping of aliovalent Mn or Nb elements into Ti site would regulate both the EC and energy storage behaviors. An enhanced EC temperature change up to 1.31 K, and a maximal recoverable energy storage density of 0.24 J cm(- 3) with the efficiency as high as 87.11 %, can be observed under 70 kV cm(- 1) in 0.5 % acceptor-doped Ba(Sn, Ti)O-3 ceramics. It is found that the local internal stress, the local charge fluctuation, and the oxygen deficiencies would benefit the electrical behaviors of this system. These results would shed light on the effect of the heterovalent substitution on the electrical properties of lead-free BaTiO3 system and provide a novel and simple route to further improve the EC response and energy storage performance.