Excellent energy storage density and efficiency in lead-free Sm-doped BaTiO3-Bi(Mg0.5Ti0.5)O3 ceramics
Excellent energy storage density and efficiency in lead-free Sm-doped BaTiO3-Bi(Mg0.5Ti0.5)O3 ceramics
复制标题
无铅 Sm 掺杂 BaTiO3-Bi(Mg0.5Ti0.5)O3 陶瓷具有优异的储能密度和效率
DOI：
10.1039/d0tc03035j
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发表时间：
2020
影响因子：
6.4
通讯作者：
Xin-Gui Tang
中科院分区：
文献类型：
--
作者：
Zhigang Liu;Zhenhua Tang;Songcheng Hu;Dijie Yao;Fei Sun;Deyang Chen;Xiao-Bin Guo;Qiu-Xiang Liu;Yan-Ping JIANG;Xin-Gui Tang
Progress in energy storage ceramics for applications has been of interest owing to their clean green nature and excellent ferroelectric/dielectric performances. In this study, lead-free Sm-doped 0.95BaTiO3–0.05Bi(Mg0.5Ti0.5)O3 (BT–BMT–xSm) relaxor ferroelectric ceramics were synthesized and confirmed to be an appropriate material for storage devices. After the introduction of Sm2O3 into BT–BMT ceramics, their hysteresis loops gradually shrank and became slender, which is beneficial to achieving high efficiency energy storage in ceramic capacitors. The maximum recoverable energy density for the BT–BMT–xSm (x = 0.03) sample reached 3.86 J cm−3 at normal temperature, and its corresponding energy efficiency reached 81.6%. Moreover, it was found from impedance spectroscopy that the breakdown field strength is related to the oxygen defect content in the samples. Ceramic samples with fewer defects have better insulation performance, which means that a high breakdown field strength will be obtained. With proper doping, enhanced relaxor behaviour and breakdown field strength were obtained to achieve excellent energy storage properties.
