Structure-design strategy of 0-3 type (Bi0.32Sr0.42Na0.20)TiO3/MgO composite to boost energy storage density, efficiency and charge-discharge performance
Structure-design strategy of 0-3 type (Bi0.32Sr0.42Na0.20)TiO3/MgO composite to boost energy storage density, efficiency and charge-discharge performance
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0-3型(Bi0.32Sr0.42Na0.20)TiO3/MgO复合材料的结构设计策略提高储能密度、效率和充放电性能
DOI：
10.1016/j.jeurceramsoc.2019.03.047
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发表时间：
2019-08-01
影响因子：
5.7
通讯作者：
Zhai, Jiwei
中科院分区：
文献类型：
--
作者：
Li, Feng;Hou, Xu;Zhai, Jiwei
研究了一种新型0-3型（Bi0.32Sr0.42Na0.20）TiO_3/MgO复合材料，该材料在低电场（20 kV/mm）下具有高的储能密度w（s）（约为2.50 J/cm ~ 3）、可恢复储能密度W（R）（约为2.09 J/cm ~ 3）和高的储能效率η（约为84%）。通过数值模拟（COMSOL）揭示了MgO掺杂提高材料击穿强度（BDS）值的内在机理。此外，该复合材料还具有优异的充放电性能，其电流密度（C-D）和功率密度（P-D）分别为1671 A/cm（2）和150 MW/cm（3），远远上级其它陶瓷材料。此外，通过充放电测试，大部分存储的能量在0.15 μ s内（类似于）放电。本工作不仅为设计同时具有高W-d、W-eta和优异充放电性能的铋基陶瓷电容器提供了一种新技术，而且加深了对金属氧化物在复合材料中作用的理解。
A novel 0-3 type (Bi0.32Sr0.42Na0.20)TiO3/MgO composite is investigated in this work, which possesses a high stored energy storage density w(s)(similar to)2.50 J/cm(3), recoverable energy storage density W(R)(similar to)2.09 J/cm(3) with high efficiency eta(similar to)84% under low electric field (20 kV/mm). The excellent performance is owning to the increase of breakdown strength (BDS) value and the intrinsic mechanism for enhanced BDS value by MgO incorporation is disclosed by numerical simulations (COMSOL). Moreover, the studied composite exhibits excellent charge-discharge performance, the current density (C-D) and power density (P-D) are 1671 A/cm(2) and 150 MW/cm(3), respectively, which are much superior to that of other ceramics. Besides, most of the stored energy is discharged within (similar to)0.15 mu s via charge-discharge tests. This work not only provides a novel technique to designing bismuth based ceramic capacitors with simultaneously high W-d,W- eta and excellent charge-discharge performance, but also deepens the understandings of the role for the metallic oxide in the composite.